/* ==========================================================================
   上海品茶网 · 液态玻璃设计系统 (Liquid Glass / Glassmorphism)
   圆角指纹: 18px  |  间距模数: 8px  |  字体: Outfit
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
    color-scheme: dark;

    /* 色彩 */
    --bg: #070A1C;
    --ink: #F2F5FF;
    --muted: #AAB6DC;
    --pink: #FF2E88;
    --violet: #7C4DFF;
    --cyan: #00E0FF;
    --mint: #38FFC3;

    /* 玻璃 */
    --glass: rgba(255, 255, 255, .09);
    --glass-hi: rgba(255, 255, 255, .16);
    --border-color: rgba(255, 255, 255, .26);
    --blur: blur(22px) saturate(170%);

    /* 形状 */
    --radius: 18px;
    --radius-sm: 12px;
    --radius-pill: 999px;

    /* 节奏 */
    --max: 1200px;
    --nav-h: 76px;
    --s1: 8px;
    --s2: 16px;
    --s3: 24px;
    --s4: 32px;
    --s5: 48px;
    --s6: 64px;
    --s7: 96px;

    /* 动效 */
    --dur: .5s;
    --dur-fast: .28s;
    --ease: cubic-bezier(.4, .14, .3, 1);

    /* 深度 */
    --shadow-glass: 0 24px 60px -26px rgba(4, 6, 24, .85), inset 0 1px 0 rgba(255, 255, 255, .22);
    --shadow-lift: 0 30px 70px -28px rgba(4, 6, 24, .95), inset 0 1px 0 rgba(255, 255, 255, .34);
    --glow-pink: 0 18px 44px -20px rgba(255, 46, 136, .85);
    --glow-cyan: 0 18px 44px -20px rgba(0, 224, 255, .8);
}

html[data-theme="light"] {
    color-scheme: light;
    --bg: #E8EDFF;
    --ink: #0B1030;
    --muted: #454F76;
    --glass: rgba(255, 255, 255, .58);
    --glass-hi: rgba(255, 255, 255, .8);
    --border-color: rgba(11, 16, 48, .14);
    --shadow-glass: 0 24px 50px -28px rgba(28, 32, 80, .42), inset 0 1px 0 rgba(255, 255, 255, .95);
    --shadow-lift: 0 30px 60px -26px rgba(28, 32, 80, .5), inset 0 1px 0 rgba(255, 255, 255, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + var(--s3));
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--ink);
    font-family: "Outfit", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
    transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

img, svg { display: block; max-width: 100%; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--mint); }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 var(--s2); max-width: 34em; }
h1, h2, h3, h4 { margin: 0 0 var(--s2); line-height: 1.2; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 4rem); font-weight: 900; line-height: 1.1; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 18px; line-height: 1.3; }
hr { border: 0; border-top: 1px solid var(--border-color); margin: var(--s5) 0; }

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
    outline: 3px solid rgba(0, 224, 255, .75);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

.skip-link {
    position: absolute;
    left: var(--s2);
    top: -100px;
    z-index: 999;
    padding: var(--s1) var(--s3);
    border-radius: var(--radius-pill);
    background: var(--ink);
    color: var(--bg);
    font-weight: 700;
    transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: var(--s2); color: var(--bg); }

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

/* ---------- 3. 背景：虹彩液态光斑 ---------- */
.aurora {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background:
        radial-gradient(1100px 760px at 10% 6%, rgba(124, 77, 255, .55), transparent 62%),
        radial-gradient(900px 700px at 90% 10%, rgba(0, 224, 255, .40), transparent 64%),
        radial-gradient(950px 900px at 74% 92%, rgba(255, 46, 136, .36), transparent 62%),
        radial-gradient(720px 640px at 16% 88%, rgba(56, 255, 195, .30), transparent 62%),
        var(--bg);
    transition: background var(--dur) var(--ease);
}
html[data-theme="light"] .aurora {
    background:
        radial-gradient(1100px 760px at 10% 6%, rgba(124, 77, 255, .30), transparent 62%),
        radial-gradient(900px 700px at 90% 10%, rgba(0, 224, 255, .34), transparent 64%),
        radial-gradient(950px 900px at 74% 92%, rgba(255, 46, 136, .22), transparent 62%),
        radial-gradient(720px 640px at 16% 88%, rgba(56, 255, 195, .32), transparent 62%),
        var(--bg);
}
.aurora__blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px) hue-rotate(0deg);
    mix-blend-mode: screen;
    opacity: .65;
    will-change: transform;
}
html[data-theme="light"] .aurora__blob { mix-blend-mode: screen; opacity: .45; }
.aurora__blob--1 {
    width: 460px; height: 460px; top: -80px; left: 4%;
    background: linear-gradient(140deg, var(--violet), var(--pink));
    animation: drift 22s var(--ease) infinite alternate, hueRoll 18s linear infinite;
}
.aurora__blob--2 {
    width: 380px; height: 380px; top: 22%; right: 2%;
    background: linear-gradient(140deg, var(--cyan), var(--mint));
    animation: drift 26s var(--ease) infinite alternate-reverse, hueRoll 24s linear infinite;
}
.aurora__blob--3 {
    width: 520px; height: 520px; bottom: -120px; left: 34%;
    background: linear-gradient(140deg, var(--pink), var(--violet) 60%, var(--cyan));
    animation: drift 30s var(--ease) infinite alternate, hueRoll 20s linear infinite;
}
@keyframes drift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(60px, -50px, 0) scale(1.18); }
}
@keyframes hueRoll {
    from { filter: blur(70px) hue-rotate(0deg); }
    to { filter: blur(70px) hue-rotate(360deg); }
}

/* ---------- 4. 布局 ---------- */
.container {
    width: 100%;
    max-width: var(--max);
    margin-inline: auto;
    padding-inline: var(--s3);
}
.section { padding-block: clamp(48px, 8vw, 96px); }
.section--tight { padding-block: clamp(32px, 5vw, 56px); }
.section__head { max-width: 44em; margin-bottom: var(--s5); }
.section__head--center { margin-inline: auto; text-align: center; }
.section__head--center p { margin-inline: auto; }

.eyebrow {
    display: inline-block;
    margin-bottom: var(--s2);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--muted);
}
.lede { font-size: 1.0625rem; color: var(--muted); }

.grid { display: grid; gap: var(--s3); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(272px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

/* ---------- 5. 玻璃卡片 ---------- */
.glass {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--glass);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    box-shadow: var(--shadow-glass);
}
.glass::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 255, 255, .22), transparent 42%, rgba(255, 255, 255, .07));
    pointer-events: none;
}

.card {
    display: flex;
    flex-direction: column;
    gap: var(--s2);
    padding: var(--s3);
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card:hover,
.card:focus-within {
    transform: translateY(-6px);
    background: var(--glass-hi);
    border-color: rgba(255, 255, 255, .45);
    box-shadow: var(--shadow-lift);
}
.card > * { position: relative; z-index: 1; }
.card p:last-child { margin-bottom: 0; }
.card__icon {
    width: 48px;
    height: 48px;
    flex: none;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: linear-gradient(140deg, rgba(124, 77, 255, .55), rgba(0, 224, 255, .35));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45);
}
.card__icon svg { width: 24px; height: 24px; stroke: var(--ink); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.card__meta { font-size: 14px; color: var(--muted); }
.card__link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: var(--s1);
    min-height: 44px;
    font-size: 15px;
    font-weight: 700;
    color: var(--cyan);
}
.card__link svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform var(--dur-fast) var(--ease); }
.card__link:hover svg { transform: translateX(4px); }

/* ---------- 6. 按钮 / 徽标 / chip ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s1);
    min-height: 44px;
    padding: 12px 22px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
    text-align: center;
    transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.btn--primary {
    background: linear-gradient(120deg, var(--pink), var(--violet) 52%, var(--cyan));
    color: #080C20;
    box-shadow: var(--glow-pink), inset 0 1px 0 rgba(255, 255, 255, .55);
}
.btn--primary:hover { color: #080C20; transform: translateY(-2px); box-shadow: var(--glow-cyan), inset 0 1px 0 rgba(255, 255, 255, .6); }
.btn--primary:active { transform: translateY(1px) scale(.985); }

.btn--secondary {
    background: var(--glass-hi);
    border-color: var(--border-color);
    color: var(--ink);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
}
.btn--secondary:hover { background: rgba(255, 255, 255, .26); color: var(--ink); transform: translateY(-2px); }
.btn--secondary:active { transform: translateY(1px) scale(.99); }

.btn--ghost {
    background: transparent;
    color: var(--ink);
    border-color: transparent;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 5px;
    text-decoration-color: var(--border-color);
}
.btn--ghost:hover { color: var(--cyan); text-decoration-color: var(--cyan); }

.btn--sm { min-height: 44px; padding: 8px 16px; font-size: 14px; border-radius: var(--radius-sm); }
.btn--block { width: 100%; }

.btn[disabled],
.btn[aria-disabled="true"] {
    opacity: .42;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    filter: saturate(.5);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-color);
    background: var(--glass);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink);
}
.badge--hot { border-color: rgba(255, 46, 136, .55); background: rgba(255, 46, 136, .16); }
.badge--new { border-color: rgba(0, 224, 255, .55); background: rgba(0, 224, 255, .14); }
.badge--ok { border-color: rgba(56, 255, 195, .55); background: rgba(56, 255, 195, .14); }

.chips { display: flex; flex-wrap: wrap; gap: var(--s1); }
.chip {
    display: inline-flex;
    align-items: baseline;
    gap: var(--s1);
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    background: var(--glass);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    backdrop-filter: blur(14px) saturate(160%);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .04em;
    color: var(--muted);
}
.chip b { color: var(--ink); font-weight: 700; }

/* 开关 Toggle */
.toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    min-height: 44px;
    cursor: pointer;
    font-size: 15px;
    color: var(--ink);
}
.toggle input { position: absolute; opacity: 0; width: 0; height: 0; }
.toggle__track {
    position: relative;
    width: 54px;
    height: 30px;
    flex: none;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, .12);
    transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.toggle__track::before {
    content: "";
    position: absolute;
    top: 3px; left: 3px;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--ink);
    box-shadow: 0 4px 12px rgba(0, 0, 0, .45);
    transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.toggle input:checked + .toggle__track {
    background: linear-gradient(120deg, var(--violet), var(--cyan));
    border-color: transparent;
}
.toggle input:checked + .toggle__track::before { transform: translateX(24px); background: #fff; }
.toggle input:focus-visible + .toggle__track { outline: 3px solid rgba(0, 224, 255, .75); outline-offset: 3px; }

/* ---------- 7. 导航 ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 80;
    border-bottom: 1px solid var(--border-color);
    background: color-mix(in srgb, var(--bg) 62%, transparent);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
}
.nav__inner {
    display: flex;
    align-items: center;
    gap: var(--s3);
    min-height: var(--nav-h);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    margin-right: auto;
    color: var(--ink);
    font-weight: 800;
    font-size: 17px;
    letter-spacing: -.01em;
}
.brand:hover { color: var(--ink); }
.brand__mark {
    width: 40px; height: 40px;
    flex: none;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: linear-gradient(140deg, rgba(255, 46, 136, .75), rgba(124, 77, 255, .7) 50%, rgba(0, 224, 255, .7));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), var(--glow-pink);
}
.brand__mark svg { width: 22px; height: 22px; stroke: #fff; fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__text small { font-size: 11px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 15px;
    font-weight: 500;
    transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav__links a:hover { color: var(--ink); background: var(--glass-hi); }
.nav__links a[aria-current="page"] { color: var(--ink); background: var(--glass-hi); }

.nav__actions { display: flex; align-items: center; gap: var(--s1); }
.icon-btn {
    width: 44px; height: 44px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--glass);
    color: var(--ink);
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.icon-btn:hover { background: var(--glass-hi); }
.icon-btn:active { transform: scale(.95); }
.icon-btn svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.nav__toggle { display: none; }

/* ---------- 8. Hero ---------- */
.hero { padding-block: clamp(40px, 7vw, 88px) clamp(32px, 5vw, 64px); }
.hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(24px, 5vw, 56px);
    align-items: center;
}
.hero h1 { margin-bottom: var(--s3); }
.hero h1 .grad {
    background: linear-gradient(100deg, var(--pink), var(--violet) 42%, var(--cyan) 78%, var(--mint));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero .lede { font-size: clamp(1rem, 1.4vw, 1.125rem); max-width: 30em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--s2); margin-top: var(--s3); }

.hero__visual {
    position: relative;
    min-height: 380px;
    display: grid;
    place-items: center;
}
.orb {
    position: absolute;
    inset: 6% 8%;
    border-radius: 50%;
    background: conic-gradient(from 120deg, var(--pink), var(--violet), var(--cyan), var(--mint), var(--pink));
    filter: blur(38px) saturate(140%);
    opacity: .55;
    animation: spinSlow 24s linear infinite;
}
@keyframes spinSlow { to { transform: rotate(360deg); } }

.hero__panel {
    position: relative;
    width: min(100%, 420px);
    padding: var(--s3);
    display: grid;
    gap: var(--s2);
    animation: floaty 8s var(--ease) infinite alternate;
}
@keyframes floaty {
    from { transform: translateY(-8px) rotate(-.6deg); }
    to { transform: translateY(10px) rotate(.8deg); }
}
.hero__panel-head { display: flex; align-items: center; justify-content: space-between; gap: var(--s2); }
.hero__panel-title { font-weight: 700; font-size: 15px; }
.hero__rows { display: grid; gap: var(--s1); }
.hero__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s2);
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--glass);
    font-size: 14px;
    color: var(--muted);
}
.hero__row b { color: var(--ink); font-weight: 700; }
.hero__tile {
    position: absolute;
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--ink);
}
.hero__tile--a { top: 2%; left: -2%; animation: floaty 7s var(--ease) infinite alternate-reverse; }
.hero__tile--b { bottom: 4%; right: -2%; animation: floaty 9s var(--ease) infinite alternate; }

/* ---------- 9. 内页页头 ---------- */
.page-head { padding-block: clamp(40px, 6vw, 72px) var(--s4); }
.page-head h1 { font-size: clamp(1.75rem, 3.6vw, 2.75rem); }
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s1);
    margin-bottom: var(--s2);
    font-size: 13px;
    color: var(--muted);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: var(--s1); }
.breadcrumb li + li::before { content: "/"; opacity: .5; }

/* ---------- 10. 表单 ---------- */
.form { display: grid; gap: var(--s3); }
.form__row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--s3); }
.field { display: grid; gap: var(--s1); }
.field label { font-size: 14px; font-weight: 500; color: var(--ink); }
.field .hint { font-size: 13px; color: var(--muted); }
.field input,
.field select,
.field textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--glass);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    backdrop-filter: blur(14px) saturate(160%);
    color: var(--ink);
    font-family: inherit;
    font-size: 15px;
    transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.field textarea { min-height: 140px; resize: vertical; }
.field input::placeholder,
.field textarea::placeholder { color: color-mix(in srgb, var(--muted) 80%, transparent); }
.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: rgba(0, 224, 255, .7);
    box-shadow: 0 0 0 4px rgba(0, 224, 255, .18);
}
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible { outline: 3px solid rgba(0, 224, 255, .75); outline-offset: 2px; }
.field select option { background: #0B1030; color: #F2F5FF; }
html[data-theme="light"] .field select option { background: #fff; color: #0B1030; }
.checkline { display: flex; align-items: flex-start; gap: var(--s2); font-size: 14px; color: var(--muted); }
.checkline input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--violet); }
.form__note { font-size: 14px; color: var(--muted); }

.form-status {
    display: none;
    padding: var(--s2) var(--s3);
    border-radius: var(--radius);
    border: 1px solid rgba(56, 255, 195, .5);
    background: rgba(56, 255, 195, .12);
    color: var(--ink);
    font-size: 15px;
}
.form-status.is-visible { display: block; }

/* ---------- 11. 内容块 ---------- */
.split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(24px, 4vw, 48px);
    align-items: center;
}
.panel { padding: var(--s4); }
.panel > * { position: relative; z-index: 1; }

.steps { display: grid; gap: var(--s2); counter-reset: step; }
.step {
    display: flex;
    gap: var(--s3);
    padding: var(--s3);
}
.step__num {
    flex: none;
    width: 40px; height: 40px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: linear-gradient(140deg, rgba(0, 224, 255, .45), rgba(124, 77, 255, .45));
    font-weight: 800;
    font-size: 15px;
}
.step h3 { margin-bottom: 6px; }
.step p { margin-bottom: 0; font-size: 15px; color: var(--muted); }

.timeline { display: grid; gap: var(--s2); border-left: 1px solid var(--border-color); padding-left: var(--s3); }
.timeline__item { position: relative; }
.timeline__item::before {
    content: "";
    position: absolute;
    left: calc(-1 * var(--s3) - 5px);
    top: 9px;
    width: 9px; height: 9px;
    border-radius: 50%;
    background: linear-gradient(140deg, var(--pink), var(--cyan));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--bg) 70%, transparent);
}
.timeline__year { font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--cyan); }

.stat { padding: var(--s3); text-align: center; }
.stat__num {
    display: block;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(100deg, var(--cyan), var(--mint) 60%, var(--violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.stat__label { font-size: 14px; color: var(--muted); }

.list-check { display: grid; gap: var(--s2); }
.list-check li { display: flex; gap: var(--s2); font-size: 15px; color: var(--muted); }
.list-check svg { width: 20px; height: 20px; flex: none; margin-top: 2px; stroke: var(--mint); fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border-color); background: var(--glass); -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur); }
table { width: 100%; border-collapse: collapse; min-width: 520px; font-size: 15px; }
th, td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border-color); }
th { font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
tbody tr:last-child td { border-bottom: 0; }
td strong { font-weight: 700; }

.faq { display: grid; gap: var(--s2); }
.faq details {
    padding: var(--s3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--glass);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.faq details[open] { background: var(--glass-hi); border-color: rgba(255, 255, 255, .45); }
.faq summary { cursor: pointer; font-weight: 700; font-size: 16px; list-style: none; display: flex; justify-content: space-between; gap: var(--s2); align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--cyan); line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: var(--s2) 0 0; font-size: 15px; color: var(--muted); }

/* 论坛 */
.post {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: var(--s3);
    align-items: center;
    padding: var(--s3);
}
.post__avatar {
    width: 46px; height: 46px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: linear-gradient(140deg, rgba(124, 77, 255, .6), rgba(0, 224, 255, .5));
    font-weight: 800;
    font-size: 16px;
}
.post h3 { margin-bottom: 4px; font-size: 17px; }
.post h3 a { color: var(--ink); }
.post h3 a:hover { color: var(--cyan); }
.post__meta { font-size: 13px; color: var(--muted); }
.post__stats { text-align: right; font-size: 13px; color: var(--muted); white-space: nowrap; }
.post__stats b { display: block; font-size: 18px; color: var(--ink); }

.reply { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s3); padding: var(--s3); }
.reply__head { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s2); margin-bottom: var(--s1); font-size: 14px; color: var(--muted); }
.reply__head b { color: var(--ink); }
.reply p:last-child { margin-bottom: 0; }

.tabs { display: flex; flex-wrap: wrap; gap: var(--s1); margin-bottom: var(--s3); }
.tabs a, .tabs span {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    background: var(--glass);
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
}
.tabs a:hover { color: var(--ink); background: var(--glass-hi); }
.tabs [aria-current="page"] { background: linear-gradient(120deg, var(--violet), var(--cyan)); color: #080C20; border-color: transparent; font-weight: 700; }

.pagination { display: flex; flex-wrap: wrap; gap: var(--s1); justify-content: center; margin-top: var(--s5); }
.pagination a, .pagination span {
    min-width: 44px; min-height: 44px;
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--glass);
    color: var(--muted);
    font-size: 15px;
}
.pagination a:hover { color: var(--ink); background: var(--glass-hi); }
.pagination [aria-current="page"] { background: linear-gradient(120deg, var(--pink), var(--violet)); color: #080C20; border-color: transparent; font-weight: 700; }

/* 团队 */
.member { text-align: center; align-items: center; }
.member__avatar {
    width: 88px; height: 88px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: conic-gradient(from 200deg, rgba(255, 46, 136, .75), rgba(124, 77, 255, .75), rgba(0, 224, 255, .75), rgba(255, 46, 136, .75));
    font-size: 28px;
    font-weight: 900;
    color: #fff;
    box-shadow: inset 0 2px 0 rgba(255, 255, 255, .45), var(--glow-cyan);
}
.member h3 { margin-bottom: 2px; }
.member__role { font-size: 14px; font-weight: 500; letter-spacing: .06em; color: var(--cyan); }

/* CTA 收束块 */
.cta-band {
    padding: clamp(32px, 5vw, 56px);
    text-align: center;
    background: linear-gradient(130deg, rgba(255, 46, 136, .22), rgba(124, 77, 255, .22) 45%, rgba(0, 224, 255, .22));
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band p { margin-inline: auto; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--s2); justify-content: center; margin-top: var(--s3); }

/* ---------- 12. 页脚 ---------- */
.footer {
    margin-top: var(--s7);
    border-top: 1px solid var(--border-color);
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
}
.footer__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--s5);
    padding-block: var(--s6) var(--s5);
}
.footer__brand p { font-size: 14px; color: var(--muted); max-width: 32em; }
.footer h3 { font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 500; margin-bottom: var(--s2); }
.footer__links { display: grid; gap: 4px; }
.footer__links a { display: inline-flex; align-items: center; min-height: 36px; color: var(--ink); font-size: 15px; }
.footer__links a:hover { color: var(--cyan); }
.footer__bottom {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s2);
    justify-content: space-between;
    align-items: center;
    padding-block: var(--s3);
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--muted);
}
.footer__bottom a { color: var(--muted); }
.footer__bottom a:hover { color: var(--ink); }

.to-top {
    position: fixed;
    right: var(--s3);
    bottom: var(--s3);
    z-index: 70;
    width: 46px; height: 46px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--glass-hi);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    color: var(--ink);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 13. 进场动效 ---------- */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 900px) {
    .hero__grid { grid-template-columns: 1fr; }
    .hero__visual { order: -1; min-height: 300px; }

    .nav__toggle { display: grid; }
    .nav__links {
        position: absolute;
        left: var(--s3);
        right: var(--s3);
        top: calc(var(--nav-h) + 4px);
        flex-direction: column;
        align-items: stretch;
        gap: var(--s1);
        padding: var(--s2);
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        background: color-mix(in srgb, var(--bg) 88%, transparent);
        -webkit-backdrop-filter: var(--blur);
        backdrop-filter: var(--blur);
        box-shadow: var(--shadow-lift);
        display: none;
    }
    .nav__links.is-open { display: flex; }
    .nav__links a { min-height: 48px; }
    .nav__cta { display: none; }
}

@media (max-width: 620px) {
    .post { grid-template-columns: auto minmax(0, 1fr); }
    .post__stats { grid-column: 2; text-align: left; display: flex; gap: var(--s3); }
    .post__stats b { display: inline; font-size: 14px; }
    .footer__grid { grid-template-columns: 1fr; gap: var(--s4); }
    .hero__tile { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}