/* =========================================================
   比特行情 BITPULSE
   轻量金融信息站样式，无外部字体与框架依赖
   ========================================================= */

:root {
    --bg: #f5f2ea;
    --bg-soft: #faf8f3;
    --paper: #fffdf8;
    --ink: #12221a;
    --ink-soft: #25392e;
    --muted: #64736a;
    --muted-light: #89958e;
    --line: #ded9ce;
    --line-strong: #cbc5b7;
    --orange: #f7931a;
    --orange-deep: #b45309;
    --orange-soft: #fff1dc;
    --green: #147a45;
    --green-soft: #e8f5ee;
    --red: #bd3a2f;
    --red-soft: #fcece9;
    --forest: #0c2017;
    --forest-2: #123026;
    --cream: #f5f2ea;
    --radius-sm: 12px;
    --radius: 20px;
    --radius-lg: 28px;
    --container: 1180px;
    --shadow-sm: 0 1px 2px rgba(18, 34, 26, 0.04), 0 8px 22px rgba(18, 34, 26, 0.04);
    --shadow-lg: 0 28px 70px rgba(9, 27, 18, 0.16);
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    --font-display: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-mono: "SFMono-Regular", "Roboto Mono", "Cascadia Mono", Menlo, Consolas, monospace;
    --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(1100px 480px at 82% -12%, rgba(247, 147, 26, 0.13), transparent 62%),
        var(--bg);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    color-scheme: light;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.22;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}

::selection {
    color: var(--ink);
    background: rgba(247, 147, 26, 0.35);
}

img,
svg {
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select {
    font: inherit;
}

button {
    color: inherit;
}

h1,
h2,
h3,
h4,
p,
dl,
dd,
figure {
    margin: 0;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.22;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(1.85rem, 3.2vw, 2.65rem);
}

h3 {
    font-size: 1.15rem;
}

ul,
ol {
    margin: 0;
    padding: 0;
}

table {
    border-collapse: collapse;
    width: 100%;
}

[hidden] {
    display: none !important;
}

.container {
    width: min(calc(100% - 48px), var(--container));
    margin-inline: auto;
}

.section {
    padding: 104px 0;
}

.section-tight {
    padding-top: 48px;
}

.sr-only {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 999;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--ink);
    color: #fff;
    transform: translateY(-160%);
    transition: transform 0.2s;
}

.skip-link:focus {
    transform: translateY(0);
}

:focus-visible {
    outline: 3px solid rgba(247, 147, 26, 0.65);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ---------- 通用元素 ---------- */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    line-height: 1.4;
    text-transform: uppercase;
}

.eyebrow-line {
    width: 24px;
    height: 1px;
    background: currentColor;
}

.eyebrow-light {
    color: rgba(255, 247, 232, 0.72);
}

.card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.card-kicker {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    padding: 12px 22px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.94rem;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
    transition: transform 0.2s var(--ease), background 0.2s, color 0.2s, border-color 0.2s;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    background: var(--ink);
    color: #fffaf0;
    box-shadow: 0 10px 24px rgba(18, 34, 26, 0.16);
}

.button-primary:hover {
    background: var(--orange);
    color: var(--ink);
}

.button-secondary {
    background: transparent;
    color: var(--ink);
    border-color: var(--line-strong);
}

.button-secondary:hover {
    background: var(--paper);
    border-color: var(--ink);
}

.button-dark {
    background: var(--forest);
    color: #fffaf0;
}

.button-dark:hover {
    background: var(--orange);
    color: var(--ink);
}

.button-ghost-light {
    border-color: rgba(18, 34, 26, 0.35);
    color: var(--ink);
}

.button-ghost-light:hover {
    background: rgba(18, 34, 26, 0.08);
}

.button-full {
    width: 100%;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--ink);
    font-size: 0.92rem;
    font-weight: 700;
    border-bottom: 1px solid var(--line-strong);
    transition: color 0.2s, border-color 0.2s;
}

.text-link:hover {
    color: var(--orange-deep);
    border-color: var(--orange);
}

.text-link span {
    transition: transform 0.2s var(--ease);
}

.text-link:hover span {
    transform: translateX(3px);
}

.status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 4px rgba(20, 122, 69, 0.11);
    flex: 0 0 auto;
}

.status-dot.is-live {
    background: #39d98a;
    box-shadow: 0 0 0 4px rgba(57, 217, 138, 0.14);
    animation: pulse 2.4s infinite;
}

.status-dot.is-stale {
    background: var(--orange);
    box-shadow: 0 0 0 4px rgba(247, 147, 26, 0.14);
}

.status-dot.is-offline {
    background: #a5aaa7;
    box-shadow: 0 0 0 4px rgba(100, 115, 106, 0.12);
}

.status-dot-dark {
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(20, 122, 69, 0.12);
}

.is-up {
    color: var(--green) !important;
}

.is-down {
    color: var(--red) !important;
}

.is-flat {
    color: var(--muted) !important;
}

.muted {
    color: var(--muted);
}

.numeric {
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.45;
    }
}

/* ---------- 演示提示 ---------- */

.demo-banner {
    padding: 9px 24px;
    background: #fff1d6;
    color: #7c3e00;
    font-size: 0.8rem;
    text-align: center;
    border-bottom: 1px solid #f3d29a;
}

/* ---------- 顶部信息条与导航 ---------- */

.topbar {
    background: var(--forest);
    color: rgba(255, 250, 240, 0.72);
    font-size: 0.75rem;
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 34px;
    gap: 20px;
}

.topbar-note {
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.topbar .status-dot {
    width: 6px;
    height: 6px;
    background: var(--orange);
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.18);
}

.topbar-date {
    font-family: var(--font-mono);
    letter-spacing: 0.02em;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(245, 242, 234, 0.88);
    border-bottom: 1px solid rgba(203, 197, 183, 0.7);
    backdrop-filter: saturate(140%) blur(18px);
    -webkit-backdrop-filter: saturate(140%) blur(18px);
}

.site-header.is-scrolled {
    box-shadow: 0 12px 32px rgba(18, 34, 26, 0.07);
}

.header-inner {
    display: flex;
    align-items: center;
    min-height: 76px;
    gap: 34px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    flex: 0 0 auto;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: linear-gradient(145deg, #ffb347 0%, var(--orange) 58%, #e07800 100%);
    color: var(--forest);
    font-family: var(--font-display);
    font-size: 1.45rem;
    font-weight: 800;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45), 0 6px 14px rgba(180, 83, 9, 0.18);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-text strong {
    font-size: 1.04rem;
    letter-spacing: 0.02em;
}

.brand-text small {
    margin-top: 3px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.56rem;
    letter-spacing: 0.18em;
}

.header-quote {
    display: inline-flex;
    align-items: baseline;
    gap: 9px;
    margin-left: auto;
    padding-left: 24px;
    border-left: 1px solid var(--line);
    white-space: nowrap;
}

.header-quote-label {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.63rem;
    letter-spacing: 0.08em;
}

.header-quote strong {
    font-size: 0.94rem;
    font-variant-numeric: tabular-nums;
}

.header-quote-change {
    font-size: 0.75rem;
    font-weight: 700;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.header-quote + .site-nav {
    margin-left: 0;
}

.site-nav > a {
    position: relative;
    padding: 10px 13px;
    border-radius: 9px;
    color: var(--muted);
    font-size: 0.89rem;
    font-weight: 600;
    transition: color 0.2s, background 0.2s;
}

.site-nav > a:hover {
    color: var(--ink);
    background: rgba(255, 253, 248, 0.72);
}

.site-nav > a.is-active {
    color: var(--ink);
}

.site-nav > a.is-active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 5px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--orange);
    transform: translateX(-50%);
}

.site-nav .nav-cta {
    margin-left: 8px;
    padding: 10px 17px;
    background: var(--ink);
    color: #fffaf0;
    border-radius: 999px;
}

.site-nav .nav-cta:hover {
    background: var(--orange);
    color: var(--ink);
}

.site-nav .nav-cta::after {
    display: none;
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    margin-left: auto;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--paper);
    cursor: pointer;
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
    display: block;
    width: 18px;
    height: 1.5px;
    margin: 0 auto;
    background: var(--ink);
    transition: transform 0.2s;
}

.nav-toggle-lines {
    position: relative;
}

.nav-toggle-lines::before,
.nav-toggle-lines::after {
    content: "";
    position: absolute;
    left: 0;
}

.nav-toggle-lines::before {
    top: -6px;
}

.nav-toggle-lines::after {
    top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-lines {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-lines::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-lines::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ---------- 面包屑 ---------- */

.breadcrumb-wrap {
    border-bottom: 1px solid rgba(222, 217, 206, 0.7);
}

.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 9px;
    padding: 15px 0;
    color: var(--muted);
    font-size: 0.78rem;
}

.breadcrumbs a:hover {
    color: var(--orange-deep);
}

.breadcrumbs span[aria-hidden] {
    color: var(--line-strong);
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    padding: 74px 0 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(4px);
}

.hero-orb-one {
    top: -180px;
    right: -80px;
    width: 560px;
    height: 560px;
    background: radial-gradient(circle, rgba(247, 147, 26, 0.2), transparent 68%);
}

.hero-orb-two {
    top: 220px;
    left: -260px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(20, 122, 69, 0.09), transparent 70%);
}

.hero-grid-lines {
    position: absolute;
    inset: 0;
    opacity: 0.55;
    background-image:
        linear-gradient(to right, rgba(18, 34, 26, 0.045) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(18, 34, 26, 0.045) 1px, transparent 1px);
    background-size: 74px 74px;
    mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
    -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(390px, 0.94fr);
    align-items: center;
    gap: 64px;
}

.hero-copy {
    animation: rise-in 0.75s var(--ease) both;
}

.hero h1 {
    max-width: 650px;
    margin: 22px 0 24px;
    font-size: clamp(3rem, 5.4vw, 5.15rem);
    line-height: 1.03;
    letter-spacing: -0.055em;
}

.hero-highlight {
    position: relative;
    color: var(--orange-deep);
    white-space: nowrap;
}

.hero-highlight::after {
    content: "";
    position: absolute;
    left: 1%;
    right: 1%;
    bottom: -4px;
    height: 7px;
    border-radius: 50%;
    background: rgba(247, 147, 26, 0.22);
    transform: rotate(-1deg);
}

.hero-lead {
    max-width: 560px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.9;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 22px;
    margin-top: 30px;
    color: var(--muted);
    font-size: 0.76rem;
}

.hero-meta .live-note {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--ink);
    font-weight: 700;
}

.hero-meta time {
    font-variant-numeric: tabular-nums;
}

.market-card-shell {
    animation: rise-in 0.85s 0.08s var(--ease) both;
}

.market-card {
    position: relative;
    overflow: hidden;
    padding: 28px;
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(520px 260px at 100% 0%, rgba(247, 147, 26, 0.18), transparent 60%),
        linear-gradient(155deg, #0b1f17 0%, #102a20 54%, #0a1c14 100%);
    color: #fffaf0;
    box-shadow: var(--shadow-lg);
}

.market-card::after {
    content: "";
    position: absolute;
    top: -74px;
    right: -64px;
    width: 210px;
    height: 210px;
    border: 1px solid rgba(247, 147, 26, 0.16);
    border-radius: 50%;
    pointer-events: none;
}

.market-card-top {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.asset-id {
    display: flex;
    align-items: center;
    gap: 11px;
}

.asset-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--orange);
    color: var(--forest);
    font-size: 1.25rem;
    font-weight: 800;
}

.asset-id div {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.asset-id strong {
    font-size: 0.92rem;
}

.asset-id span:not(.asset-icon) {
    color: rgba(255, 250, 240, 0.53);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
}

.market-status {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: rgba(255, 250, 240, 0.74);
    font-size: 0.68rem;
    font-weight: 600;
    white-space: nowrap;
}

.market-status .status-dot {
    width: 6px;
    height: 6px;
}

.market-price-block {
    margin-top: 34px;
}

.market-price-label {
    color: rgba(255, 250, 240, 0.5);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
}

.market-price {
    margin-top: 4px;
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 4.5vw, 4.15rem);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.055em;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.market-price.is-empty {
    color: rgba(255, 250, 240, 0.32);
}

.market-usd-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 14px;
    margin-top: 13px;
    color: rgba(255, 250, 240, 0.58);
    font-size: 0.85rem;
}

.market-usd-row strong {
    color: rgba(255, 250, 240, 0.88);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.change-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    color: var(--muted);
    font-size: 0.77rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.market-card .change-pill.is-up,
.side-quote .change-pill.is-up {
    background: rgba(57, 217, 138, 0.12);
    color: #70e6a9 !important;
}

.market-card .change-pill.is-down,
.side-quote .change-pill.is-down {
    background: rgba(239, 108, 92, 0.13);
    color: #ff9c8e !important;
}

.market-card .change-pill.is-flat,
.side-quote .change-pill.is-flat {
    color: rgba(255, 250, 240, 0.65) !important;
}

.market-card .change-caption.is-up {
    color: #70e6a9 !important;
}

.market-card .change-caption.is-down {
    color: #ff9c8e !important;
}

.change-pill small {
    color: inherit;
    font-size: 0.61rem;
    font-weight: 500;
    opacity: 0.65;
}

.change-arrow {
    font-size: 0.85rem;
}

.change-caption {
    margin-top: 6px;
    color: rgba(255, 250, 240, 0.45);
    font-size: 0.7rem;
}

.range-block {
    margin-top: 26px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.085);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    color: rgba(255, 250, 240, 0.48);
    font-size: 0.67rem;
}

.range-labels strong {
    display: block;
    margin-top: 2px;
    color: rgba(255, 250, 240, 0.82);
    font-size: 0.74rem;
    font-variant-numeric: tabular-nums;
}

.range-labels span:last-child {
    text-align: right;
}

.range-track {
    position: relative;
    height: 4px;
    margin-top: 11px;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.11);
}

.range-fill {
    position: absolute;
    inset: 0 auto 0 0;
    border-radius: inherit;
    background: linear-gradient(90deg, #39d98a, var(--orange));
}

.range-knob {
    position: absolute;
    top: 50%;
    width: 11px;
    height: 11px;
    border: 2px solid #fffaf0;
    border-radius: 50%;
    background: var(--orange);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 4px rgba(247, 147, 26, 0.16);
}

.market-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.085);
    border-left: 1px solid rgba(255, 255, 255, 0.085);
}

.market-stats > div {
    padding: 15px 14px;
    border-right: 1px solid rgba(255, 255, 255, 0.085);
    border-bottom: 1px solid rgba(255, 255, 255, 0.085);
}

.market-stats dt {
    color: rgba(255, 250, 240, 0.43);
    font-size: 0.64rem;
}

.market-stats dd {
    margin-top: 4px;
    color: rgba(255, 250, 240, 0.9);
    font-size: 0.86rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.market-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 18px;
}

.market-source {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    color: rgba(255, 250, 240, 0.4);
    font-size: 0.65rem;
}

.market-source a {
    color: rgba(255, 250, 240, 0.72);
    border-bottom: 1px solid rgba(255, 250, 240, 0.18);
}

.market-source a:hover {
    color: var(--orange);
}

.dot-sep {
    opacity: 0.5;
}

.icon-button {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.045);
    color: rgba(255, 250, 240, 0.72);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.icon-button:hover {
    background: var(--orange);
    color: var(--ink);
}

.icon-button svg {
    width: 16px;
    height: 16px;
}

.icon-button.is-loading svg {
    animation: spin 0.8s linear infinite;
}

.market-alert {
    margin-top: 14px;
    padding: 9px 11px;
    border: 1px solid rgba(247, 147, 26, 0.22);
    border-radius: 9px;
    background: rgba(247, 147, 26, 0.08);
    color: #ffd39b;
    font-size: 0.7rem;
    line-height: 1.55;
}

.market-card-note {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 6px 12px;
    padding: 12px 6px 0;
    color: var(--muted);
    font-size: 0.67rem;
}

.market-card-note a {
    border-bottom: 1px solid var(--line-strong);
}

.refresh-status {
    margin-left: auto;
    color: var(--orange-deep);
    font-size: 0.66rem;
    font-weight: 600;
    white-space: nowrap;
}

.refresh-status:empty {
    display: none;
}

.market-card-note a:hover {
    color: var(--orange-deep);
}

.hero-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-top: 68px;
    border-top: 1px solid var(--line);
}

.hero-fact {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 24px 26px 28px 0;
}

.hero-fact + .hero-fact {
    padding-left: 26px;
    border-left: 1px solid var(--line);
}

.fact-index {
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding-top: 3px;
}

.hero-fact div {
    display: flex;
    flex-direction: column;
}

.hero-fact strong {
    font-size: 0.86rem;
}

.hero-fact span:not(.fact-index) {
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.74rem;
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ---------- 通用区块标题 ---------- */

.section-heading {
    max-width: 700px;
    margin-bottom: 36px;
}

.section-heading h2 {
    margin: 14px 0 13px;
}

.section-heading p {
    max-width: 630px;
    color: var(--muted);
    font-size: 0.97rem;
}

.split-heading {
    display: flex;
    max-width: none;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
}

.split-heading > div:first-child {
    max-width: 660px;
}

.period-tabs {
    display: inline-flex;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.66);
    flex: 0 0 auto;
}

.period-tabs a {
    padding: 7px 14px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 700;
    white-space: nowrap;
    transition: color 0.2s, background 0.2s;
}

.period-tabs a:hover {
    color: var(--ink);
}

.period-tabs a.is-active {
    background: var(--ink);
    color: #fffaf0;
}

/* ---------- 图表 ---------- */

.chart-card {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--paper);
    box-shadow: var(--shadow-sm);
}

.chart-card-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
    padding: 28px 30px 20px;
    border-bottom: 1px solid rgba(222, 217, 206, 0.65);
}

.chart-kicker {
    display: block;
    margin-bottom: 7px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.1em;
}

.chart-card-head strong {
    font-family: var(--font-display);
    font-size: clamp(1.65rem, 3vw, 2.35rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
}

.chart-head-caption {
    display: inline-block;
    margin-left: 8px;
    color: var(--muted);
    font-size: 0.7rem;
}

.chart-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 26px;
    color: var(--muted);
    font-size: 0.72rem;
}

.chart-summary strong {
    display: block;
    margin-top: 2px;
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 0.82rem;
    letter-spacing: 0;
}

.chart-body {
    padding: 14px 18px 4px;
}

.chart-figure {
    margin: 0;
}

.chart-figure--compact {
    display: none;
}

.chart-figure--compact .chart-label {
    font-size: 14px;
}

.chart-frame {
    position: relative;
}

.price-chart {
    display: block;
    width: 100%;
    height: auto;
    overflow: visible;
}

.chart-grid {
    stroke: #e9e4da;
    stroke-width: 1;
    stroke-dasharray: 3 5;
}

.chart-label {
    fill: #8e9992;
    font-family: var(--font-sans);
    font-size: 11px;
    font-variant-numeric: tabular-nums;
}

.chart-area {
    opacity: 0.9;
}

.chart-line {
    stroke-dasharray: 3000;
    stroke-dashoffset: 3000;
    animation: draw-line 1.5s var(--ease) forwards;
}

.chart-dot-halo {
    animation: dot-pulse 2.6s infinite;
    transform-box: fill-box;
    transform-origin: center;
}

@keyframes draw-line {
    to {
        stroke-dashoffset: 0;
    }
}

@keyframes dot-pulse {
    0%,
    100% {
        opacity: 0.16;
        transform: scale(1);
    }
    50% {
        opacity: 0.34;
        transform: scale(1.35);
    }
}

.chart-crosshair {
    stroke: #b9b2a5;
    stroke-width: 1;
    stroke-dasharray: 3 4;
    opacity: 0;
    pointer-events: none;
}

.chart-frame.is-hovering .chart-crosshair {
    opacity: 1;
}

.chart-tip {
    position: absolute;
    z-index: 5;
    min-width: 114px;
    padding: 8px 11px;
    border-radius: 8px;
    background: rgba(12, 32, 23, 0.94);
    color: #fffaf0;
    box-shadow: 0 8px 20px rgba(9, 27, 18, 0.18);
    pointer-events: none;
    transform: translate(-50%, calc(-100% - 12px));
    white-space: nowrap;
}

.chart-tip-date {
    display: block;
    color: rgba(255, 250, 240, 0.58);
    font-size: 0.62rem;
}

.chart-tip-price {
    display: block;
    margin-top: 1px;
    font-size: 0.82rem;
    font-variant-numeric: tabular-nums;
}

.chart-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 15px 30px 18px;
    border-top: 1px solid rgba(222, 217, 206, 0.65);
    color: var(--muted);
    font-size: 0.69rem;
}

.chart-card-foot a {
    color: var(--ink);
    font-weight: 700;
}

.chart-card-foot a:hover {
    color: var(--orange-deep);
}

.chart-figure figcaption {
    padding: 6px 14px 14px;
    color: var(--muted-light);
    font-size: 0.66rem;
    text-align: center;
}

.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    padding: 32px;
    border: 1px dashed var(--line-strong);
    border-radius: 14px;
    background: rgba(245, 242, 234, 0.58);
    text-align: center;
}

.chart-empty strong {
    font-size: 0.95rem;
}

.chart-empty span {
    max-width: 380px;
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.78rem;
}

/* ---------- 换算区 ---------- */

.converter-section {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(900px 500px at 12% 0%, rgba(247, 147, 26, 0.12), transparent 58%),
        linear-gradient(145deg, #0b1f17, #102a20 55%, #0a1c14);
    color: #fffaf0;
}

.converter-section::after {
    content: "₿";
    position: absolute;
    right: -40px;
    bottom: -190px;
    color: rgba(255, 255, 255, 0.025);
    font-family: var(--font-display);
    font-size: 620px;
    font-weight: 800;
    line-height: 1;
    pointer-events: none;
}

.converter-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(350px, 440px);
    align-items: center;
    gap: 80px;
}

.converter-copy h2 {
    margin: 18px 0 22px;
    font-size: clamp(2.2rem, 4.2vw, 3.5rem);
    letter-spacing: -0.045em;
}

.converter-copy .eyebrow {
    color: #ffbf67;
}

.converter-copy > p {
    max-width: 540px;
    color: rgba(255, 250, 240, 0.62);
    font-size: 0.98rem;
}

.converter-copy .inline-price {
    color: #fffaf0;
    font-variant-numeric: tabular-nums;
}

.converter-copy .text-link {
    margin-top: 22px;
    color: #ffbf67;
    border-color: rgba(255, 191, 103, 0.4);
}

.converter-copy .text-link:hover {
    color: #fffaf0;
    border-color: #fffaf0;
}

.converter-note {
    display: flex;
    gap: 11px;
    max-width: 480px;
    margin-top: 42px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.11);
    color: rgba(255, 250, 240, 0.44);
    font-size: 0.72rem;
}

.note-icon {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 19px;
    height: 19px;
    margin-top: 2px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 50%;
    font-family: Georgia, serif;
    font-size: 0.66rem;
    font-style: italic;
}

.quick-converter {
    padding: 27px;
    background: var(--paper);
    color: var(--ink);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.24);
}

.quick-converter-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
    font-size: 0.86rem;
    font-weight: 700;
}

.live-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 9px;
    border-radius: 999px;
    background: var(--green-soft);
    color: var(--green);
    font-size: 0.65rem;
    font-weight: 600;
    white-space: nowrap;
}

.quick-converter label,
.field-label {
    display: block;
    margin-bottom: 7px;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
}

.input-shell {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-shell:focus-within {
    border-color: var(--orange);
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.12);
}

.input-shell input {
    width: 100%;
    min-width: 0;
    padding: 13px 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--ink);
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
}

.input-shell input[readonly] {
    color: var(--ink);
}

.input-suffix {
    flex: 0 0 auto;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.equals-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 10px;
    margin: 12px 0;
    color: var(--muted-light);
    font-size: 0.8rem;
}

.equals-row span:first-child,
.equals-row span:last-child {
    height: 1px;
    background: var(--line);
}

.input-shell-result {
    background: var(--orange-soft);
    border-color: #f4d8ae;
}

.quick-converter .button {
    margin-top: 16px;
}

.form-hint {
    margin-top: 11px;
    color: var(--muted-light);
    font-size: 0.67rem;
    line-height: 1.55;
}

.form-error {
    margin: 0 0 14px;
    padding: 9px 12px;
    border-radius: 8px;
    background: var(--red-soft);
    color: var(--red);
    font-size: 0.75rem;
}

/* ---------- 行情解读 ---------- */

.insight-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.36fr) minmax(300px, 0.64fr);
    gap: 70px;
    align-items: start;
}

.insight-main h2 {
    margin: 16px 0 23px;
}

.insight-main p {
    max-width: 680px;
    color: var(--muted);
    font-size: 0.96rem;
}

.insight-main p + p {
    margin-top: 14px;
}

.insight-main .lead-paragraph {
    color: var(--ink-soft);
    font-size: 1.08rem;
    line-height: 1.9;
}

.insight-main strong {
    color: var(--ink);
}

.insight-side {
    padding: 27px;
}

.insight-side h3 {
    margin-bottom: 20px;
    font-size: 1.08rem;
}

.number-list {
    list-style: none;
}

.number-list li {
    display: flex;
    gap: 13px;
    padding: 14px 0;
    border-top: 1px solid var(--line);
}

.number-list li:last-child {
    padding-bottom: 20px;
}

.number-index {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 25px;
    height: 25px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.61rem;
    font-weight: 700;
}

.number-list strong {
    font-size: 0.82rem;
}

.number-list p {
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.72rem;
    line-height: 1.6;
}

/* ---------- 指南卡片 ---------- */

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 34px;
}

.guide-card {
    position: relative;
    padding: 26px 24px 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.6);
}

.guide-number {
    display: block;
    margin-bottom: 28px;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.69rem;
    font-weight: 700;
}

.guide-card h3 {
    margin-bottom: 10px;
    font-size: 1.08rem;
}

.guide-card p {
    color: var(--muted);
    font-size: 0.83rem;
    line-height: 1.75;
}

.table-card {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--paper);
    box-shadow: var(--shadow-sm);
}

.table-card-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding: 27px 28px 22px;
    border-bottom: 1px solid var(--line);
}

.table-card-head h2,
.table-card-head h3 {
    margin: 2px 0 5px;
    font-size: 1.24rem;
}

.table-card-head p {
    color: var(--muted);
    font-size: 0.77rem;
}

.table-scroll {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table-card table {
    min-width: 560px;
}

.table-card th,
.table-card td {
    padding: 15px 28px;
    border-bottom: 1px solid rgba(222, 217, 206, 0.65);
    text-align: left;
    font-size: 0.82rem;
}

.table-card thead th {
    color: var(--muted);
    background: rgba(245, 242, 234, 0.58);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.table-card tbody th {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.table-card tbody tr:last-child th,
.table-card tbody tr:last-child td {
    border-bottom: 0;
}

.table-card tbody tr:hover {
    background: rgba(247, 147, 26, 0.035);
}

.table-card td.numeric {
    font-variant-numeric: tabular-nums;
}

.table-stamp {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    white-space: nowrap;
}

.table-footnote {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 20px;
    padding: 12px 28px 16px;
    border-top: 1px solid var(--line);
    color: var(--muted-light);
    font-size: 0.64rem;
}

/* ---------- FAQ ---------- */

.faq-preview {
    border-top: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.48);
}

.faq-layout {
    display: grid;
    grid-template-columns: minmax(260px, 0.7fr) minmax(0, 1.3fr);
    gap: 85px;
    align-items: start;
}

.faq-intro h2 {
    margin: 15px 0 18px;
}

.faq-intro p {
    max-width: 360px;
    color: var(--muted);
    font-size: 0.93rem;
}

.faq-intro .button {
    margin-top: 24px;
}

.faq-list details {
    border-top: 1px solid var(--line);
}

.faq-list details:last-child {
    border-bottom: 1px solid var(--line);
}

.faq-list summary {
    position: relative;
    padding: 22px 42px 22px 0;
    font-size: 0.96rem;
    font-weight: 700;
    list-style: none;
    cursor: pointer;
}

.faq-list summary::-webkit-details-marker {
    display: none;
}

.faq-list summary::after {
    content: "+";
    position: absolute;
    top: 19px;
    right: 4px;
    display: grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 400;
    transition: transform 0.2s, background 0.2s;
}

.faq-list details[open] summary::after {
    content: "−";
    background: var(--orange);
    border-color: var(--orange);
    color: var(--ink);
}

.faq-list details p {
    max-width: 660px;
    padding: 0 42px 24px 0;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.85;
}

/* ---------- 收尾 CTA ---------- */

.closing-cta {
    position: relative;
    overflow: hidden;
    padding: 64px 0;
    background: var(--orange);
    color: var(--ink);
}

.closing-cta::before {
    content: "";
    position: absolute;
    top: -140px;
    right: 8%;
    width: 420px;
    height: 420px;
    border: 1px solid rgba(18, 34, 26, 0.16);
    border-radius: 50%;
}

.closing-cta::after {
    content: "";
    position: absolute;
    top: -60px;
    right: 15%;
    width: 260px;
    height: 260px;
    border: 1px solid rgba(18, 34, 26, 0.12);
    border-radius: 50%;
}

.closing-cta-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
}

.closing-cta h2 {
    margin: 12px 0 9px;
    font-size: clamp(1.8rem, 3.6vw, 2.8rem);
}

.closing-cta p {
    max-width: 520px;
    color: rgba(18, 34, 26, 0.72);
    font-size: 0.92rem;
}

.closing-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    flex: 0 0 auto;
}

.closing-cta .eyebrow-light {
    color: rgba(18, 34, 26, 0.62);
}

.closing-cta .button-primary {
    background: var(--ink);
    color: #fffaf0;
}

.closing-cta .button-primary:hover {
    background: #fffaf0;
    color: var(--ink);
}

/* ---------- 页脚 ---------- */

.site-footer {
    padding: 66px 0 28px;
    background: var(--forest);
    color: rgba(255, 250, 240, 0.58);
    font-size: 0.79rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(280px, 1.7fr) repeat(3, minmax(130px, 0.75fr));
    gap: 54px;
    padding-bottom: 50px;
}

.brand-footer {
    color: #fffaf0;
}

.brand-footer .brand-text small {
    color: rgba(255, 250, 240, 0.4);
}

.footer-brand p {
    max-width: 380px;
    margin-top: 18px;
    color: rgba(255, 250, 240, 0.48);
    font-size: 0.76rem;
    line-height: 1.8;
}

.footer-brand .footer-small {
    margin-top: 10px;
    color: rgba(255, 250, 240, 0.32);
    font-size: 0.68rem;
}

.footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

.footer-column h3 {
    margin-bottom: 7px;
    color: rgba(255, 250, 240, 0.85);
    font-size: 0.77rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.footer-column a,
.footer-column span {
    color: rgba(255, 250, 240, 0.47);
    font-size: 0.73rem;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--orange);
}

.footer-disclaimer {
    padding: 21px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 250, 240, 0.37);
    font-size: 0.68rem;
    line-height: 1.8;
}

.footer-disclaimer strong {
    color: rgba(255, 250, 240, 0.6);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px 28px;
    padding-top: 22px;
    font-size: 0.66rem;
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.footer-legal a:hover {
    color: var(--orange);
}

.to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 40;
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--paper);
    color: var(--ink);
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
}

.to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ---------- 内页通用 ---------- */

.page-hero {
    padding: 58px 0 30px;
    border-bottom: 1px solid rgba(222, 217, 206, 0.78);
    background:
        radial-gradient(800px 340px at 88% 0%, rgba(247, 147, 26, 0.12), transparent 68%),
        rgba(250, 248, 243, 0.28);
}

.page-hero h1 {
    margin: 17px 0 17px;
    font-size: clamp(2.6rem, 5.1vw, 4.35rem);
    line-height: 1.08;
    letter-spacing: -0.05em;
}

.page-lead {
    max-width: 700px;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.85;
}

.page-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    margin-top: 22px;
    color: var(--muted);
    font-size: 0.72rem;
}

.page-meta > span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.page-hero-grid {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
}

.period-switcher {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
    flex: 0 0 auto;
    padding: 5px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 253, 248, 0.7);
}

.period-switcher a {
    min-width: 78px;
    padding: 9px 13px;
    border-radius: 11px;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 700;
    text-align: center;
    white-space: nowrap;
}

.period-switcher a:hover {
    color: var(--ink);
}

.period-switcher a.is-active {
    background: var(--ink);
    color: #fffaf0;
}

.h1-badge {
    display: inline-block;
    margin-left: 12px;
    padding: 6px 11px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--orange-deep);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0;
    vertical-align: middle;
    white-space: nowrap;
}

/* ---------- 历史行情 ---------- */

.history-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 24px;
    align-items: start;
}

.history-main {
    min-width: 0;
}

.chart-card-history .chart-body {
    padding-top: 8px;
}

.metric-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.58);
}

.metric-strip > div {
    padding: 18px 20px;
}

.metric-strip > div + div {
    border-left: 1px solid var(--line);
}

.metric-strip span {
    display: block;
    color: var(--muted);
    font-size: 0.66rem;
}

.metric-strip strong {
    display: block;
    margin-top: 5px;
    font-size: 0.92rem;
    font-variant-numeric: tabular-nums;
}

.history-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.side-quote {
    padding: 24px;
}

.side-quote h2 {
    margin: 0 0 15px;
    font-size: 1rem;
}

.side-quote-price {
    font-family: var(--font-display);
    font-size: 1.78rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.side-quote-sub {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
    color: var(--muted);
    font-size: 0.72rem;
}

.side-quote .change-pill {
    background: rgba(18, 34, 26, 0.06);
}

.side-quote-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 5px 14px;
    margin: 17px 0;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.67rem;
}

.side-quote-meta strong {
    color: var(--ink-soft);
    font-weight: 600;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.side-quote-list {
    margin: 8px 0 17px;
    padding-top: 10px;
    border-top: 1px solid var(--line);
}

.side-quote-list > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    padding: 7px 0;
}

.side-quote-list dt {
    color: var(--muted);
    font-size: 0.67rem;
}

.side-quote-list dd {
    color: var(--ink);
    font-size: 0.72rem;
    font-weight: 600;
    text-align: right;
}

.side-quote .button {
    margin-top: 3px;
}

.side-quote > .text-link {
    margin-top: 15px;
    font-size: 0.76rem;
}

.side-nav-card {
    padding: 24px;
}

.side-nav-card h2 {
    margin-bottom: 14px;
    font-size: 1rem;
}

.side-period-list {
    display: flex;
    flex-direction: column;
}

.side-period-list a {
    padding: 11px 0;
    border-top: 1px solid var(--line);
}

.side-period-list a:last-child {
    border-bottom: 1px solid var(--line);
}

.side-period-list span {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
}

.side-period-list small {
    display: block;
    margin-top: 2px;
    color: var(--muted);
    font-size: 0.67rem;
    line-height: 1.5;
}

.side-period-list a:hover span,
.side-period-list a.is-active span {
    color: var(--orange-deep);
}

.data-note {
    padding: 22px 23px;
    border: 1px solid #ecd7b2;
    border-radius: var(--radius);
    background: #fff7e9;
}

.data-note strong {
    display: block;
    margin-bottom: 7px;
    font-size: 0.8rem;
}

.data-note p {
    color: #72634e;
    font-size: 0.71rem;
    line-height: 1.65;
}

.data-note a {
    display: inline-block;
    margin-top: 10px;
    color: var(--orange-deep);
    font-size: 0.7rem;
    font-weight: 700;
}

.data-note a:hover {
    text-decoration: underline;
}

.table-card-history {
    margin-top: 28px;
}

.price-table {
    min-width: 650px;
}

.price-table th,
.price-table td {
    padding: 13px 22px;
}

.price-table tbody th {
    font-size: 0.8rem;
}

.weekday {
    margin-left: 7px;
    color: var(--muted-light);
    font-size: 0.65rem;
    font-weight: 400;
}

.table-stamp {
    padding: 6px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
}

.empty-panel {
    padding: 50px 30px;
    text-align: center;
}

.empty-panel strong {
    font-size: 0.98rem;
}

.empty-panel p {
    max-width: 440px;
    margin: 7px auto 18px;
    color: var(--muted);
    font-size: 0.8rem;
}

/* ---------- 正文与侧栏 ---------- */

.prose-section {
    border-top: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.5);
}

.prose-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 80px;
    align-items: start;
}

.prose {
    max-width: 740px;
    min-width: 0;
}

.prose h2 {
    margin: 15px 0 20px;
    font-size: clamp(1.7rem, 3vw, 2.25rem);
}

.prose h3 {
    margin: 30px 0 9px;
    font-size: 1.02rem;
}

.prose p {
    color: var(--muted);
    font-size: 0.91rem;
    line-height: 1.95;
}

.prose p + p {
    margin-top: 14px;
}

.prose strong {
    color: var(--ink);
}

.prose-callout {
    margin-top: 30px;
    padding: 20px 22px;
    border-left: 3px solid var(--orange);
    border-radius: 0 12px 12px 0;
    background: var(--orange-soft);
}

.prose-callout strong {
    display: block;
    margin-bottom: 4px;
    font-size: 0.78rem;
}

.prose-callout p {
    font-size: 0.78rem;
    line-height: 1.75;
}

.prose-aside {
    position: sticky;
    top: 110px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.62);
}

.prose-aside h2 {
    margin-bottom: 14px;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    letter-spacing: 0;
}

.prose-aside a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 11px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.76rem;
}

.prose-aside a:hover {
    color: var(--orange-deep);
}

/* ---------- 换算页 ---------- */

.converter-hero-price {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding: 20px 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.7);
}

.converter-hero-price span {
    color: var(--muted);
    font-size: 0.7rem;
}

.converter-hero-price strong {
    margin: 1px 0;
    font-family: var(--font-display);
    font-size: 1.9rem;
    line-height: 1.2;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
}

.converter-hero-price small {
    color: var(--muted-light);
    font-size: 0.64rem;
}

.converter-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr);
    gap: 26px;
    align-items: start;
}

.converter-card {
    padding: 30px;
}

.converter-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
}

.converter-card-head h2 {
    font-size: 1.35rem;
}

.direction-switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin: 0 0 23px;
    padding: 5px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: var(--bg-soft);
}

.direction-switch label {
    display: block;
    margin: 0;
    border-radius: 9px;
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
}

.direction-switch input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.direction-switch span {
    display: block;
    padding: 9px 12px;
    border-radius: 9px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.direction-switch label.is-active span,
.direction-switch input:checked + span {
    background: var(--paper);
    color: var(--ink);
    box-shadow: 0 2px 8px rgba(18, 34, 26, 0.08);
}

.direction-switch i {
    color: var(--orange-deep);
    font-style: normal;
}

.input-shell-large input {
    padding: 18px 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.convert-divider {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: var(--muted-light);
}

.convert-divider span {
    height: 1px;
    background: var(--line);
}

.convert-divider i {
    display: grid;
    place-items: center;
    width: 29px;
    height: 29px;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--muted);
    font-size: 0.74rem;
    font-style: normal;
}

.converter-result {
    padding: 22px 23px;
    border: 1px solid #efd2a7;
    border-radius: 14px;
    background: linear-gradient(135deg, #fff6e6, #fffaf2);
}

.result-label {
    display: block;
    color: #8a6a3d;
    font-size: 0.7rem;
}

.converter-result strong {
    display: block;
    margin-top: 2px;
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.4vw, 2.55rem);
    line-height: 1.2;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.converter-result small {
    display: block;
    margin-top: 5px;
    color: #8b7b66;
    font-size: 0.67rem;
}

.converter-card .button {
    margin-top: 20px;
}

.converter-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.conversion-formula {
    padding: 24px;
}

.conversion-formula h2 {
    margin-bottom: 14px;
    font-size: 1rem;
}

.formula-row {
    padding: 11px 0;
    border-top: 1px solid var(--line);
}

.formula-row span {
    display: block;
    margin-bottom: 3px;
    color: var(--muted);
    font-size: 0.66rem;
}

.formula-row code {
    display: block;
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    line-height: 1.6;
}

.conversion-formula p {
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.7rem;
    line-height: 1.65;
}

/* ---------- 知识文章 ---------- */

.article-head {
    max-width: 920px;
}

.article-head h1 {
    max-width: 880px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 9px 24px;
    margin-top: 24px;
    color: var(--muted);
    font-size: 0.71rem;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 78px;
    align-items: start;
}

.article-body {
    max-width: 760px;
    min-width: 0;
}

.article-body > h2 {
    margin: 48px 0 15px;
    padding-top: 4px;
    font-size: clamp(1.65rem, 2.8vw, 2.15rem);
    scroll-margin-top: 110px;
}

.article-body > h2:first-of-type {
    margin-top: 38px;
}

.article-body h3 {
    margin: 28px 0 8px;
    font-size: 1.04rem;
}

.article-body p {
    color: #43534a;
    font-size: 0.97rem;
    line-height: 1.95;
}

.article-body p + p {
    margin-top: 15px;
}

.article-body strong {
    color: var(--ink);
}

.answer-box {
    padding: 22px 24px;
    border: 1px solid #efd2a7;
    border-radius: 14px;
    background: #fff7e9;
}

.answer-label {
    display: inline-block;
    margin-bottom: 7px;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.answer-box p {
    color: #5f5040;
    font-size: 0.91rem;
    line-height: 1.85;
}

.fact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin: 26px 0 8px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.fact-grid > div {
    padding: 15px 17px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.fact-grid span {
    display: block;
    color: var(--muted);
    font-size: 0.65rem;
}

.fact-grid strong {
    display: block;
    margin-top: 3px;
    font-size: 0.84rem;
}

.formula-box {
    margin: 24px 0;
    padding: 20px 22px;
    border: 1px solid var(--line);
    border-left: 3px solid var(--orange);
    border-radius: 0 12px 12px 0;
    background: var(--paper);
}

.formula-box span {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
}

.formula-box small {
    display: block;
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.67rem;
}

.article-list {
    margin: 20px 0;
    padding-left: 21px;
    color: #43534a;
    font-size: 0.94rem;
    line-height: 1.9;
}

.article-list li {
    padding-left: 4px;
    margin-bottom: 10px;
}

.article-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 40px;
    padding: 24px 26px;
    border-radius: 14px;
    background: var(--forest);
    color: #fffaf0;
}

.article-cta strong {
    color: #fffaf0;
    font-size: 1.02rem;
}

.article-cta p {
    margin-top: 4px;
    color: rgba(255, 250, 240, 0.58);
    font-size: 0.76rem;
    line-height: 1.65;
}

.article-cta .button {
    flex: 0 0 auto;
    background: var(--orange);
    color: var(--ink);
}

.article-cta .button:hover {
    background: #fffaf0;
}

.article-footer-note {
    margin-top: 34px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
    color: var(--muted-light);
    font-size: 0.7rem;
}

.article-aside {
    position: sticky;
    top: 104px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.toc {
    padding: 23px;
}

.toc h2 {
    margin-bottom: 12px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    letter-spacing: 0;
}

.toc a {
    display: block;
    padding: 8px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.74rem;
    line-height: 1.5;
}

.toc a:hover {
    color: var(--orange-deep);
}

/* ---------- FAQ 页 ---------- */

.faq-hero-card {
    flex: 0 0 auto;
    min-width: 230px;
    padding: 20px 23px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.76);
}

.faq-hero-card > span {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.63rem;
    letter-spacing: 0.08em;
}

.faq-hero-card > strong {
    display: block;
    margin: 3px 0 5px;
    font-family: var(--font-display);
    font-size: 1.65rem;
    letter-spacing: -0.04em;
    font-variant-numeric: tabular-nums;
}

.faq-hero-card > div {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    font-size: 0.72rem;
}

.faq-hero-card .change-pill {
    background: rgba(18, 34, 26, 0.06);
}

.faq-hero-card small {
    display: block;
    margin-top: 12px;
    color: var(--muted-light);
    font-size: 0.64rem;
}

.faq-page-main {
    min-width: 0;
}

.faq-page-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: start;
}

.faq-page-list {
    border-top: 1px solid var(--line-strong);
}

.faq-page-list details {
    border-bottom: 1px solid var(--line);
}

.faq-page-list summary {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 23px 0;
    font-size: 0.98rem;
    font-weight: 700;
    list-style: none;
    cursor: pointer;
}

.faq-page-list summary::-webkit-details-marker {
    display: none;
}

.faq-number {
    flex: 0 0 auto;
    padding-top: 2px;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.66rem;
}

.faq-page-list summary > span:nth-child(2) {
    flex: 1;
}

.faq-page-list summary i {
    position: relative;
    flex: 0 0 auto;
    width: 24px;
    height: 24px;
    margin-top: -1px;
    border: 1px solid var(--line);
    border-radius: 50%;
}

.faq-page-list summary i::before,
.faq-page-list summary i::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 9px;
    height: 1px;
    background: var(--muted);
    transform: translate(-50%, -50%);
}

.faq-page-list summary i::after {
    transform: translate(-50%, -50%) rotate(90deg);
    transition: transform 0.2s;
}

.faq-page-list details[open] summary i {
    background: var(--orange);
    border-color: var(--orange);
}

.faq-page-list details[open] summary i::before,
.faq-page-list details[open] summary i::after {
    background: var(--ink);
}

.faq-page-list details[open] summary i::after {
    transform: translate(-50%, -50%) rotate(0deg);
}

.faq-answer {
    padding: 0 40px 24px 34px;
}

.faq-answer p {
    max-width: 680px;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.85;
}

.faq-page-aside {
    position: sticky;
    top: 104px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-page-aside .side-quote p {
    margin-bottom: 15px;
    color: var(--muted);
    font-size: 0.76rem;
    line-height: 1.7;
}

.faq-page-aside .side-quote .text-link {
    margin-top: 14px;
    font-size: 0.74rem;
}

.faq-page-aside .toc a:last-child {
    border-bottom: 1px solid var(--line);
}

.faq-more {
    margin-top: 32px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 253, 248, 0.6);
}

.faq-more h2 {
    font-size: 1.2rem;
}

.faq-more p {
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.8rem;
}

.faq-more-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

/* ---------- 关于页 ---------- */

.about-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 76px;
    align-items: start;
}

.about-main {
    max-width: 780px;
    min-width: 0;
}

.about-intro {
    padding-bottom: 30px;
    border-bottom: 1px solid var(--line);
}

.about-intro h2 {
    margin-bottom: 13px;
    font-size: 1.45rem;
}

.about-intro p,
.about-block > p {
    color: var(--muted);
    font-size: 0.91rem;
    line-height: 1.95;
}

.about-intro p + p,
.about-block > p + p {
    margin-top: 12px;
}

.about-block {
    padding: 32px 0;
    border-bottom: 1px solid var(--line);
    scroll-margin-top: 110px;
}

.about-block h2 {
    margin: 3px 0 13px;
    font-size: 1.52rem;
}

.source-table {
    margin-top: 20px;
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
}

.source-table th,
.source-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
    font-size: 0.74rem;
}

.source-table thead th {
    color: var(--muted);
    background: rgba(245, 242, 234, 0.6);
    font-size: 0.65rem;
    font-weight: 600;
}

.source-table tbody th {
    font-weight: 600;
}

.source-table tbody th a {
    display: block;
    color: var(--ink);
    border-bottom: 1px solid transparent;
}

.source-table tbody th a:hover {
    color: var(--orange-deep);
    border-color: var(--orange);
}

.source-table tbody th small {
    display: block;
    margin-top: 2px;
    color: var(--muted-light);
    font-size: 0.62rem;
    font-weight: 400;
}

.source-table tbody tr:last-child th,
.source-table tbody tr:last-child td {
    border-bottom: 0;
}

.small-note {
    margin-top: 12px;
    color: var(--muted-light) !important;
    font-size: 0.68rem !important;
}

.method-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    margin: 20px 0;
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    background: var(--line);
}

.method-grid > div {
    padding: 16px 17px;
    background: var(--paper);
}

.method-grid strong {
    display: block;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.73rem;
}

.method-grid span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.7rem;
    line-height: 1.6;
}

.about-list {
    margin-top: 15px;
    padding-left: 19px;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.85;
}

.about-list li {
    margin-bottom: 9px;
}

.about-list strong {
    color: var(--ink);
}

.disclaimer-box {
    margin-top: 17px;
    padding: 21px 23px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 253, 248, 0.68);
}

.disclaimer-box p {
    color: var(--muted);
    font-size: 0.79rem;
    line-height: 1.8;
}

.disclaimer-box p + p {
    margin-top: 9px;
}

.about-aside {
    position: sticky;
    top: 104px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.about-facts {
    margin: 12px 0 17px;
}

.about-facts > div {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    padding: 8px 0;
    border-top: 1px solid var(--line);
}

.about-facts dt {
    color: var(--muted);
    font-size: 0.67rem;
}

.about-facts dd {
    color: var(--ink);
    font-size: 0.71rem;
    font-weight: 600;
    text-align: right;
}

/* ---------- 404 ---------- */

.error-page {
    padding: 100px 0 120px;
}

.error-inner {
    max-width: 620px;
    text-align: center;
}

.error-code {
    display: inline-block;
    color: var(--orange-deep);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
}

.error-inner h1 {
    margin: 16px 0 12px;
    font-size: clamp(2.2rem, 4.8vw, 3.6rem);
}

.error-inner > p {
    color: var(--muted);
    font-size: 0.93rem;
}

.error-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 25px;
}

.error-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
}

.error-links a {
    color: var(--muted);
    font-size: 0.76rem;
}

.error-links a:hover {
    color: var(--orange-deep);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1120px) {
    .header-quote {
        display: none;
    }

    .hero-grid {
        gap: 42px;
    }

    .hero h1 {
        font-size: clamp(2.85rem, 5vw, 4.4rem);
    }

    .insight-grid {
        gap: 44px;
    }

    .converter-grid {
        gap: 50px;
    }

    .article-layout,
    .about-layout {
        gap: 46px;
    }
}

@media (max-width: 960px) {
    .section {
        padding: 82px 0;
    }

    .site-nav > a {
        padding: 10px;
        font-size: 0.84rem;
    }

    .hero {
        padding-top: 52px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 38px;
    }

    .hero-copy {
        max-width: 680px;
    }

    .market-card-shell {
        max-width: 560px;
    }

    .hero-facts {
        margin-top: 44px;
    }

    .split-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
    }

    .converter-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .converter-copy {
        max-width: 620px;
    }

    .converter-note {
        margin-top: 26px;
    }

    .quick-converter {
        max-width: 500px;
    }

    .insight-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .insight-side {
        max-width: 620px;
    }

    .guide-grid {
        grid-template-columns: 1fr 1fr;
    }

    .guide-card:last-child {
        grid-column: 1 / -1;
    }

    .faq-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .faq-intro {
        max-width: 560px;
    }

    .closing-cta-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 25px;
    }

    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .history-grid {
        grid-template-columns: 1fr;
    }

    .history-side {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .history-side .data-note {
        grid-column: 1 / -1;
    }

    .prose-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .prose {
        max-width: 760px;
    }

    .prose-aside {
        position: static;
        max-width: 520px;
    }

    .converter-layout {
        grid-template-columns: 1fr;
    }

    .converter-side {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .converter-side .data-note {
        grid-column: 1 / -1;
    }

    .article-layout,
    .about-layout {
        grid-template-columns: 1fr;
        gap: 38px;
    }

    .article-body,
    .about-main {
        max-width: 760px;
    }

    .article-aside,
    .about-aside {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .article-aside .data-note,
    .about-aside .data-note {
        grid-column: 1 / -1;
    }

    .faq-page-layout {
        grid-template-columns: 1fr;
    }

    .faq-page-aside {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .faq-page-aside .data-note {
        grid-column: 1 / -1;
    }
}

@media (max-width: 820px) {
    .container {
        width: min(calc(100% - 36px), var(--container));
    }

    .topbar-date {
        display: none;
    }

    .topbar-inner {
        justify-content: center;
    }

    .header-inner {
        min-height: 68px;
        gap: 16px;
    }

    .nav-toggle {
        display: block;
    }

    .site-nav {
        position: absolute;
        top: calc(100% + 9px);
        left: 18px;
        right: 18px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 16px;
        background: var(--paper);
        box-shadow: var(--shadow-lg);
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav > a {
        padding: 12px 14px;
        border-radius: 9px;
        font-size: 0.88rem;
    }

    .site-nav > a.is-active::after {
        left: auto;
        right: 14px;
        bottom: 50%;
        transform: translateY(50%);
    }

    .site-nav .nav-cta {
        margin: 5px 0 0;
        padding: 12px 14px;
        border-radius: 9px;
        text-align: center;
    }

    .hero h1 {
        font-size: clamp(2.55rem, 8vw, 3.8rem);
    }

    .hero-facts {
        grid-template-columns: 1fr;
    }

    .hero-fact {
        padding: 17px 0;
    }

    .hero-fact + .hero-fact {
        padding-left: 0;
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .page-hero-grid {
        align-items: flex-start;
        flex-direction: column;
        gap: 25px;
    }

    .period-switcher {
        grid-template-columns: repeat(4, 1fr);
        width: 100%;
    }

    .period-switcher a {
        min-width: 0;
    }

    .converter-hero-price {
        align-items: flex-start;
        width: 100%;
    }

    .faq-hero-card {
        width: 100%;
    }

    .chart-card-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 14px;
        padding: 23px 22px 16px;
    }

    .chart-summary {
        gap: 10px 24px;
    }

    .chart-body {
        padding: 10px 8px 0;
    }

    .chart-card-foot {
        padding: 14px 22px 17px;
    }

    .metric-strip {
        grid-template-columns: 1fr 1fr;
    }

    .metric-strip > div:nth-child(3) {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .metric-strip > div:nth-child(4) {
        border-top: 1px solid var(--line);
    }

    .history-side {
        grid-template-columns: 1fr;
    }

    .history-side .data-note {
        grid-column: auto;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 34px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .footer-column:last-child {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px 20px;
    }

    .footer-column:last-child h3 {
        grid-column: 1 / -1;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .article-body > h2 {
        margin-top: 38px;
    }

    .article-cta {
        align-items: flex-start;
        flex-direction: column;
        gap: 17px;
    }

    .article-aside,
    .about-aside,
    .faq-page-aside {
        grid-template-columns: 1fr;
    }

    .article-aside .data-note,
    .about-aside .data-note,
    .faq-page-aside .data-note {
        grid-column: auto;
    }
}

@media (max-width: 620px) {
    body {
        font-size: 15px;
    }

    .container {
        width: min(calc(100% - 28px), var(--container));
    }

    .section {
        padding: 64px 0;
    }

    .section-tight {
        padding-top: 32px;
    }

    .topbar {
        font-size: 0.68rem;
    }

    .topbar-inner {
        min-height: 31px;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 11px;
        font-size: 1.3rem;
    }

    .brand-text strong {
        font-size: 0.96rem;
    }

    .hero {
        padding-top: 40px;
    }

    .hero h1 {
        margin-top: 18px;
    }

    .hero-lead {
        font-size: 0.95rem;
    }

    .hero-actions .button {
        flex: 1 1 auto;
    }

    .hero-meta {
        gap: 9px 16px;
        font-size: 0.68rem;
    }

    .market-card {
        padding: 22px 19px;
        border-radius: 23px;
    }

    .market-price {
        font-size: clamp(2.3rem, 11vw, 3.4rem);
    }

    .market-stats > div {
        padding: 13px 11px;
    }

    .market-card-note {
        font-size: 0.61rem;
    }

    .hero-facts {
        margin-top: 30px;
    }

    .hero-fact {
        gap: 10px;
        padding: 14px 0;
    }

    .period-tabs {
        width: 100%;
        overflow-x: auto;
        border-radius: 12px;
    }

    .period-tabs a {
        flex: 1;
        padding: 7px 10px;
        text-align: center;
    }

    .chart-card {
        border-radius: 20px;
    }

    .chart-card-head {
        padding: 20px 17px 14px;
    }

    .chart-card-head strong {
        font-size: 1.65rem;
    }

    .chart-summary {
        display: grid;
        grid-template-columns: 1fr 1fr;
        width: 100%;
        gap: 8px 16px;
    }

    .chart-figure--desktop {
        display: none;
    }

    .chart-figure--compact {
        display: block;
    }

    .chart-label {
        /* SVG 用户单位会随图表宽度缩放，移动端需要放大才能保持可读。 */
        font-size: 18px;
    }

    .chart-figure--compact .chart-label {
        font-size: 14px;
    }

    .table-card .price-table {
        min-width: 100%;
    }

    .table-card .price-table th,
    .table-card .price-table td {
        padding: 11px 9px;
        font-size: 0.72rem;
    }

    .table-card .price-table th:nth-child(4),
    .table-card .price-table td:nth-child(4) {
        display: none;
    }

    .table-card .price-table tbody th {
        font-size: 0.72rem;
    }

    .table-card .price-table .weekday {
        display: block;
        margin-left: 0;
    }

    .chart-card-foot {
        padding: 13px 17px 15px;
        font-size: 0.63rem;
    }

    .chart-figure figcaption {
        padding-inline: 4px;
        font-size: 0.61rem;
    }

    .converter-grid {
        gap: 28px;
    }

    .converter-copy h2 {
        font-size: 2.15rem;
    }

    .quick-converter {
        padding: 21px 18px;
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }

    .guide-card:last-child {
        grid-column: auto;
    }

    .guide-number {
        margin-bottom: 18px;
    }

    .table-card {
        border-radius: 16px;
    }

    .table-card-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 9px;
        padding: 20px 18px 16px;
    }

    .table-card th,
    .table-card td {
        padding: 12px 17px;
        font-size: 0.77rem;
    }

    .table-card table.compact-table {
        min-width: 100%;
    }

    .compact-table th,
    .compact-table td {
        padding: 12px 9px;
        font-size: 0.71rem;
    }

    .table-footnote {
        padding: 10px 18px 13px;
    }

    .faq-list summary {
        padding: 18px 36px 18px 0;
        font-size: 0.9rem;
    }

    .faq-list details p {
        padding-right: 18px;
        font-size: 0.8rem;
    }

    .faq-layout {
        gap: 23px;
    }

    .closing-cta {
        padding: 46px 0;
    }

    .closing-cta-actions {
        width: 100%;
    }

    .closing-cta-actions .button {
        flex: 1 1 auto;
    }

    .site-footer {
        padding-top: 48px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-brand,
    .footer-column:last-child {
        grid-column: auto;
    }

    .footer-column:last-child {
        display: flex;
    }

    .footer-legal {
        gap: 10px 16px;
    }

    .page-hero {
        padding: 38px 0 24px;
    }

    .page-hero h1 {
        font-size: 2.45rem;
    }

    .h1-badge {
        display: block;
        width: fit-content;
        margin: 10px 0 0;
    }

    .period-switcher {
        grid-template-columns: 1fr 1fr;
    }

    .metric-strip > div {
        padding: 14px 13px;
    }

    .metric-strip strong {
        font-size: 0.8rem;
    }

    .side-quote {
        padding: 20px;
    }

    .side-quote-price {
        font-size: 1.58rem;
    }

    .prose h2 {
        font-size: 1.65rem;
    }

    .prose-aside {
        padding: 20px;
    }

    .converter-card {
        padding: 22px 18px;
    }

    .converter-card-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .input-shell-large input {
        padding: 15px 0;
        font-size: 1.25rem;
    }

    .converter-result {
        padding: 18px;
    }

    .converter-result strong {
        font-size: 1.8rem;
    }

    .converter-side {
        display: flex;
    }

    .article-head h1 {
        font-size: 2.25rem;
    }

    .article-body p {
        font-size: 0.92rem;
    }

    .fact-grid {
        grid-template-columns: 1fr 1fr;
    }

    .article-cta {
        padding: 21px;
    }

    .article-cta .button {
        width: 100%;
    }

    .faq-page-list summary {
        gap: 11px;
        font-size: 0.9rem;
    }

    .faq-answer {
        padding: 0 0 21px 25px;
    }

    .faq-more {
        padding: 21px;
    }

    .about-block {
        padding: 26px 0;
    }

    .method-grid {
        grid-template-columns: 1fr;
    }

    .source-table {
        min-width: 100%;
    }

    .source-table th:nth-child(2),
    .source-table td:nth-child(2) {
        display: none;
    }

    .source-table th,
    .source-table td {
        padding: 10px 11px;
        font-size: 0.69rem;
    }

    .about-aside {
        display: flex;
    }

    .error-page {
        padding: 65px 0 80px;
    }

    .to-top {
        right: 14px;
        bottom: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .chart-line {
        stroke-dasharray: none;
        stroke-dashoffset: 0;
    }
}

@media print {
    .topbar,
    .site-header,
    .closing-cta,
    .site-footer,
    .to-top,
    .market-card-foot,
    .chart-card-foot {
        display: none !important;
    }

    body {
        background: #fff;
    }

    .market-card {
        color: #000;
        background: #fff;
        border: 1px solid #ccc;
        box-shadow: none;
    }

    .market-card * {
        color: #000 !important;
    }
}