/* ---------- 1. 设计令牌 ---------- */
:root {
    --coral: oklch(0.70 0.17 25);
    --coral-deep: oklch(0.58 0.18 25);
    --coral-soft: oklch(0.92 0.05 25);
    --coral-bg: oklch(0.98 0.015 25);
    --leaf: oklch(0.72 0.12 145);
    --leaf-deep: oklch(0.50 0.10 145);
    --ink: oklch(0.18 0.02 25);
    --ink-soft: oklch(0.32 0.02 25);
    --muted: oklch(0.55 0.015 25);
    --line: oklch(0.92 0.01 25);
    --line-strong: oklch(0.85 0.015 25);
    --paper: oklch(0.995 0.005 25);
    --cream: oklch(0.975 0.012 50);
    --shadow-sm: 0 1px 2px rgba(40, 10, 5, 0.04);
    --shadow-md: 0 8px 24px -8px rgba(40, 10, 5, 0.10), 0 2px 6px rgba(40, 10, 5, 0.04);
    --shadow-lg: 0 24px 64px -24px rgba(40, 10, 5, 0.18), 0 8px 24px -12px rgba(40, 10, 5, 0.08);
    --radius: 14px;
    --radius-sm: 8px;
    --radius-lg: 22px;
    --font-display: "Space Grotesk", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
    --font-body: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
    --max: 1180px;
}

/* ---------- 2. 基础重置与排版 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--paper);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0;
    text-wrap: balance;
    color: var(--ink);
}
h1 { font-size: clamp(38px, 5vw, 64px); line-height: 1.05; letter-spacing: -0.035em; }
h2 { font-size: clamp(28px, 3.4vw, 42px); line-height: 1.15; letter-spacing: -0.025em; }
h3 { font-size: clamp(20px, 1.8vw, 24px); line-height: 1.25; }
h4 { font-size: 17px; line-height: 1.3; }
p { margin: 0; text-wrap: pretty; }

/* ---------- 3. 布局容器 ---------- */
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }

/* ---------- 4. 公共组件 ---------- */

/* Topbar / Nav */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in oklch, var(--paper) 88%, transparent);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 600; font-size: 18px; letter-spacing: -0.01em; }
.brand .logo { width: 32px; height: 32px; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { font-size: 14.5px; color: var(--ink-soft); font-weight: 500; transition: color 0.15s; position: relative; }
.nav a:hover, .nav a.active { color: var(--coral-deep); }
.nav a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -22px; height: 2px; background: var(--coral); border-radius: 2px; }
.topbar-cta { display: flex; gap: 10px; align-items: center; }
.menu-toggle { display: none; background: transparent; border: 1px solid var(--line-strong); border-radius: 10px; padding: 8px 10px; cursor: pointer; color: var(--ink); }
.menu-toggle svg { width: 20px; height: 20px; }

/* Mobile menu (slide-down) */
.mobile-menu { display: none; padding: 8px 0 16px; border-top: 1px solid var(--line); background: var(--paper); }
.mobile-menu.open { display: block; }
.mobile-menu .nav-links { display: flex; flex-direction: column; gap: 2px; }
.mobile-menu a { padding: 12px 0; font-size: 16px; color: var(--ink); border-bottom: 1px solid var(--line); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .mobile-cta { margin-top: 16px; display: flex; gap: 10px; }
.mobile-menu .mobile-cta .btn { flex: 1; justify-content: center; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 14.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-primary { background: var(--coral); color: white; box-shadow: 0 6px 16px -6px color-mix(in oklch, var(--coral) 70%, transparent); }
.btn-primary:hover { background: var(--coral-deep); transform: translateY(-1px); box-shadow: 0 10px 22px -8px color-mix(in oklch, var(--coral) 80%, transparent); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--cream); border-color: var(--coral); color: var(--coral-deep); }
.btn-dark { background: var(--ink); color: white; }
.btn-dark:hover { background: oklch(0.28 0.02 25); transform: translateY(-1px); }
.btn-lg { padding: 14px 26px; font-size: 15.5px; border-radius: 14px; }
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 10px; }
.btn.disabled { opacity: 0.5; pointer-events: none; }

/* Eyebrow / Card / Page-hero / Crumbs */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--coral-deep);
    padding: 6px 12px;
    background: var(--coral-soft);
    border-radius: 100px;
    margin-bottom: 18px;
}
.eyebrow .dot { width: 6px; height: 6px; background: var(--coral); border-radius: 50%; animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; transition: all 0.2s ease; }
.card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-md); }

.page-hero {
    padding: 72px 0 56px;
    background: linear-gradient(180deg, var(--coral-bg) 0%, var(--paper) 100%);
    border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: clamp(34px, 4.4vw, 52px); }
.page-hero p.lead { font-size: 18px; color: var(--ink-soft); max-width: 640px; margin-top: 16px; line-height: 1.55; }

.crumbs { display: flex; gap: 8px; align-items: center; font-size: 13px; font-family: var(--font-mono); color: var(--muted); margin-bottom: 18px; }
.crumbs a:hover { color: var(--coral-deep); }
.crumbs .sep { opacity: 0.5; }

/* Footer */
.footer { border-top: 1px solid var(--line); background: var(--cream); padding: 64px 0 32px; color: var(--ink-soft); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 48px; margin-bottom: 48px; }
.footer h5 {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink);
    margin: 0 0 14px 0;
}
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 9px; }
.footer a { font-size: 14px; color: var(--ink-soft); }
.footer a:hover { color: var(--coral-deep); }
.footer-tag { font-size: 14px; line-height: 1.6; max-width: 280px; margin-top: 14px; }
.footer-bottom {
    border-top: 1px solid var(--line);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--muted);
}

/* ---------- 5. 工具类 ---------- */
.muted { color: var(--muted); }
.hl-coral { color: var(--coral-deep); }
.divider { height: 1px; background: var(--line); margin: 0; }
.grapefruit-bg { position: absolute; pointer-events: none; user-select: none; opacity: 0.06; }

/* ============================================================================
 * 6. 页面专属：home (首页)
 * ============================================================================ */

/* Hero */
.hero {
    position: relative;
    padding: 88px 0 112px;
    background:
        radial-gradient(ellipse 600px 400px at 85% -10%, oklch(0.92 0.08 25 / 0.7), transparent 60%),
        radial-gradient(ellipse 500px 300px at 10% 30%, oklch(0.94 0.05 50 / 0.5), transparent 60%),
        var(--paper);
    overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: center; }
.hero h1 .accent {
    background: linear-gradient(135deg, var(--coral) 0%, oklch(0.62 0.20 35) 60%, var(--coral-deep) 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { font-size: clamp(17px, 1.5vw, 19px); color: var(--ink-soft); margin-top: 22px; max-width: 520px; line-height: 1.6; }
.hero .cta-row { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero .trust-row { display: flex; gap: 28px; margin-top: 40px; align-items: center; flex-wrap: wrap; }
.trust-item { display: flex; flex-direction: column; gap: 2px; }
.trust-item .num { font-family: var(--font-display); font-size: 22px; font-weight: 600; color: var(--ink); letter-spacing: -0.02em; }
.trust-item .lbl { font-size: 12px; color: var(--muted); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em; }

/* Phone mockup */
.hero-visual { position: relative; width: 100%; max-width: 460px; margin-left: auto; padding: 40px 30px; }
.hero-visual::before, .hero-visual::after { content: ""; position: absolute; border-radius: 50%; filter: blur(40px); pointer-events: none; z-index: 0; }
.hero-visual::before { width: 260px; height: 260px; background: radial-gradient(circle, oklch(0.80 0.16 25 / 0.55), transparent 70%); top: -20px; right: -30px; }
.hero-visual::after { width: 220px; height: 220px; background: radial-gradient(circle, oklch(0.80 0.10 145 / 0.40), transparent 70%); bottom: -10px; left: -20px; }
.phone {
    position: relative;
    z-index: 2;
    width: 280px;
    aspect-ratio: 280 / 580;
    margin: 0 auto;
    background: oklch(0.14 0.01 25);
    border-radius: 42px;
    padding: 10px;
    box-shadow:
        0 60px 80px -30px oklch(0.20 0.10 25 / 0.40),
        0 20px 40px -16px oklch(0.20 0.10 25 / 0.25),
        inset 0 0 0 1px oklch(0.32 0.02 25);
}
.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 32px;
    background:
        radial-gradient(ellipse 280px 200px at 50% 0%, oklch(0.94 0.06 25 / 0.9), transparent 70%),
        var(--paper);
    padding: 28px 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow: hidden;
    position: relative;
}
.phone-notch {
    position: absolute;
    top: 10px; left: 50%;
    transform: translateX(-50%);
    width: 92px; height: 24px;
    background: oklch(0.10 0.01 25);
    border-radius: 100px;
    z-index: 3;
}
.phone-status { display: flex; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: 11px; font-weight: 600; color: var(--ink); padding: 0 6px; margin-top: 2px; }
.phone-status .ico-row { display: flex; gap: 5px; align-items: center; }
.phone-status .signal { display: inline-flex; gap: 1.5px; align-items: flex-end; height: 10px; }
.phone-status .signal span { width: 2.5px; background: var(--ink); border-radius: 0.5px; }
.phone-status .signal span:nth-child(1) { height: 30%; }
.phone-status .signal span:nth-child(2) { height: 55%; }
.phone-status .signal span:nth-child(3) { height: 80%; }
.phone-status .signal span:nth-child(4) { height: 100%; }
.phone-status .battery { width: 22px; height: 11px; border: 1px solid var(--ink); border-radius: 3px; padding: 1.5px; position: relative; }
.phone-status .battery::after { content: ""; position: absolute; right: -3px; top: 50%; transform: translateY(-50%); width: 1.5px; height: 5px; background: var(--ink); border-radius: 0 1px 1px 0; }
.phone-status .battery span { display: block; height: 100%; width: 80%; background: var(--ink); border-radius: 1px; }
.phone-header { display: flex; justify-content: space-between; align-items: center; padding: 4px 4px 0; gap: 8px; }
.phone-header .title { font-family: var(--font-display); font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }
.phone-header .status-pill {
    display: inline-flex; align-items: center; gap: 5px;
    background: oklch(0.94 0.06 145);
    color: oklch(0.40 0.12 145);
    padding: 4px 9px;
    border-radius: 100px;
    font-size: 10px;
    font-weight: 600;
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
    white-space: nowrap;
    flex-shrink: 0;
}
.phone-header .status-pill .live { width: 5px; height: 5px; border-radius: 50%; background: var(--leaf-deep); box-shadow: 0 0 0 3px oklch(0.72 0.12 145 / 0.30); animation: livePulse 1.6s ease-in-out infinite; }
@keyframes livePulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.connect-wrap { flex: 1; display: flex; align-items: center; justify-content: center; position: relative; }
.connect-ring {
    position: absolute;
    inset: 50% 50% auto auto;
    transform: translate(50%, -50%);
    width: 200px; height: 200px;
    border-radius: 50%;
    border: 1px dashed oklch(0.55 0.18 25 / 0.3);
    animation: spinSlow 24s linear infinite;
}
@keyframes spinSlow { to { transform: translate(50%, -50%) rotate(360deg); } }
.connect-btn {
    width: 168px; height: 168px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, oklch(0.94 0.06 50) 0%, oklch(0.86 0.10 50) 100%);
    box-shadow: 0 18px 40px -12px oklch(0.55 0.20 25 / 0.55), 0 4px 12px -4px oklch(0.55 0.20 25 / 0.25);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
}
.connect-btn .grapefruit { width: 100%; height: 100%; position: relative; z-index: 1; }
.pulse-ring { position: absolute; inset: -14%; border-radius: 50%; border: 1.5px solid oklch(0.70 0.17 25 / 0.50); animation: pulseRing 2.6s ease-out infinite; pointer-events: none; }
.pulse-ring:nth-of-type(2) { animation-delay: 0.9s; }
.pulse-ring:nth-of-type(3) { animation-delay: 1.8s; }
@keyframes pulseRing {
    0% { transform: scale(0.78); opacity: 0.75; }
    100% { transform: scale(1.5); opacity: 0; }
}
.leaf-decor {
    position: absolute;
    top: -18px; right: 18px;
    width: 36px; height: 22px;
    background: radial-gradient(ellipse at 30% 60%, oklch(0.74 0.14 145), oklch(0.50 0.13 145));
    border-radius: 100% 0 100% 0;
    transform: rotate(-28deg);
    z-index: 3;
}
.speed-block { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 2px; }
.speed-cell { background: var(--cream); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.speed-cell .lbl { font-family: var(--font-mono); font-size: 9px; text-transform: uppercase; letter-spacing: 0.10em; color: var(--muted); }
.speed-cell .val { font-family: var(--font-display); font-weight: 600; font-size: 17px; color: var(--ink); letter-spacing: -0.02em; margin-top: 1px; }
.speed-cell .val small { font-family: var(--font-mono); font-weight: 500; font-size: 10px; color: var(--muted); margin-left: 2px; letter-spacing: 0; }
.node-now { display: flex; align-items: center; gap: 10px; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 9px 11px; }
.node-now .flag { width: 26px; height: 26px; border-radius: 7px; background: var(--coral-soft); color: var(--coral-deep); font-family: var(--font-mono); font-size: 10px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.node-now .name { flex: 1; }
.node-now .name .big { font-size: 12px; font-weight: 600; color: var(--ink); }
.node-now .name .small { font-size: 10px; color: var(--muted); font-family: var(--font-mono); letter-spacing: 0.04em; margin-top: 1px; }
.node-now .ms-tag { font-family: var(--font-mono); font-size: 11px; color: var(--leaf-deep); font-weight: 600; }

.float-card {
    position: absolute;
    z-index: 4;
    background: white;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 10px 14px;
    box-shadow: var(--shadow-lg);
    font-family: var(--font-body);
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    animation: float 4.5s ease-in-out infinite;
}
.float-card .ico { width: 28px; height: 28px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.float-card .ico.coral { background: var(--coral-soft); color: var(--coral-deep); }
.float-card .ico.leaf { background: oklch(0.94 0.06 145); color: oklch(0.40 0.12 145); }
.float-card .ico svg { width: 14px; height: 14px; }
.float-card .text { display: flex; flex-direction: column; gap: 1px; }
.float-card .text .t1 { font-size: 12px; font-weight: 600; color: var(--ink); line-height: 1.2; }
.float-card .text .t2 { font-size: 10.5px; color: var(--muted); font-family: var(--font-mono); letter-spacing: 0.04em; line-height: 1.2; }
.float-1 { top: 28%; left: -6px; animation-delay: 0s; }
.float-2 { top: 52%; right: -8px; animation-delay: 1.2s; }
.float-3 { bottom: 14%; left: -6px; animation-delay: 2.4s; }
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-7px); }
}

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 56px; }
.feature-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; transition: all 0.2s; position: relative; overflow: hidden; }
.feature-card:hover { border-color: var(--coral); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.feature-icon { width: 44px; height: 44px; border-radius: 12px; background: var(--coral-soft); color: var(--coral-deep); display: flex; align-items: center; justify-content: center; margin-bottom: 22px; }
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { margin-bottom: 8px; font-size: 18px; }
.feature-card p { color: var(--ink-soft); font-size: 14.5px; line-height: 1.6; }

/* Nodes */
.nodes { background: var(--cream); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.nodes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.node-list { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 6px; box-shadow: var(--shadow-md); }
.node-row { display: grid; grid-template-columns: 38px 1fr auto auto; align-items: center; gap: 14px; padding: 14px 18px; border-radius: 10px; transition: background 0.15s; border-bottom: 1px solid var(--line); }
.node-row:last-child { border-bottom: none; }
.node-row:hover { background: var(--coral-bg); }
.node-flag { width: 38px; height: 28px; border-radius: 6px; background: var(--coral-bg); color: var(--coral-deep); font-family: var(--font-mono); font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; letter-spacing: 0.04em; }
.node-name { font-size: 14.5px; font-weight: 500; }
.node-name small { display: block; color: var(--muted); font-weight: 400; font-size: 12px; font-family: var(--font-mono); margin-top: 1px; }
.node-ping { font-family: var(--font-mono); font-size: 13px; color: var(--leaf-deep); font-weight: 500; }
.node-bars { display: flex; gap: 2px; align-items: flex-end; width: 28px; height: 18px; }
.node-bars span { flex: 1; background: var(--leaf); border-radius: 1px; opacity: 0.95; }
.node-bars span:nth-child(1) { height: 40%; }
.node-bars span:nth-child(2) { height: 65%; }
.node-bars span:nth-child(3) { height: 90%; }
.node-bars span:nth-child(4) { height: 100%; }

/* Platforms */
.platforms {
    padding: 96px 0;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse 700px 400px at 90% 0%, oklch(0.94 0.07 25 / 0.55), transparent 60%),
        radial-gradient(ellipse 600px 350px at 10% 100%, oklch(0.94 0.05 90 / 0.55), transparent 60%),
        var(--paper);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.platforms-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 48px; }
.platform-card {
    background: var(--paper);
    border: 1px solid var(--line);
    padding: 32px 28px;
    border-radius: var(--radius-lg);
    transition: all 0.25s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    overflow: hidden;
}
.platform-card::before {
    content: "";
    position: absolute;
    top: -40px; right: -40px;
    width: 120px; height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--coral-bg) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.25s;
}
.platform-card:hover { border-color: var(--coral); transform: translateY(-4px); box-shadow: 0 24px 40px -20px oklch(0.55 0.18 25 / 0.25), 0 8px 16px -8px oklch(0.55 0.18 25 / 0.10); }
.platform-card:hover::before { opacity: 1; }
.platform-card .pico-wrap { width: 52px; height: 52px; border-radius: 14px; background: var(--coral-bg); color: var(--coral-deep); display: flex; align-items: center; justify-content: center; transition: all 0.25s; position: relative; z-index: 1; }
.platform-card:hover .pico-wrap { background: var(--coral); color: white; transform: scale(1.05); }
.platform-card .pico { width: 28px; height: 28px; }
.platform-card .pname { font-family: var(--font-display); font-weight: 600; font-size: 19px; color: var(--ink); letter-spacing: -0.01em; position: relative; z-index: 1; }
.platform-card .pmeta { font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); letter-spacing: 0.04em; margin-top: -10px; position: relative; z-index: 1; }
.platform-card .ptag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--leaf-deep);
    background: oklch(0.94 0.06 145);
    padding: 3px 8px;
    border-radius: 100px;
    width: fit-content;
    letter-spacing: 0.04em;
    position: relative;
    z-index: 1;
}
.platform-card .pdl { margin-top: auto; padding-top: 8px; display: flex; align-items: center; justify-content: space-between; font-size: 13.5px; color: var(--coral-deep); font-weight: 600; border-top: 1px solid var(--line); transition: color 0.2s; position: relative; z-index: 1; }
.platform-card .pdl svg { transition: transform 0.2s; }
.platform-card:hover .pdl svg { transform: translateX(4px); }

/* How */
.how-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 56px; position: relative; }
.how-step { position: relative; }
.how-num { font-size: 14px; font-weight: 600; color: var(--coral-deep); background: var(--coral-soft); padding: 4px 10px; border-radius: 100px; display: inline-block; margin-bottom: 16px; font-family: var(--font-mono); letter-spacing: 0.06em; }
.how-step h3 { font-size: 20px; margin-bottom: 8px; }
.how-step p { color: var(--ink-soft); font-size: 15px; }

/* Articles strip on home */
.articles-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.article-mini { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; transition: all 0.2s; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 10px; }
.article-mini:hover { border-color: var(--coral); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.article-mini .tag { font-family: var(--font-mono); font-size: 11px; color: var(--coral-deep); text-transform: uppercase; letter-spacing: 0.12em; }
.article-mini h3 { font-size: 17px; line-height: 1.35; }
.article-mini p { color: var(--ink-soft); font-size: 14px; line-height: 1.6; flex: 1; }
.article-mini .meta { font-family: var(--font-mono); font-size: 12px; color: var(--muted); padding-top: 12px; border-top: 1px solid var(--line); margin-top: 4px; display: flex; justify-content: space-between; }

/* Final CTA */
.final-cta { padding: 96px 0; text-align: center; background: linear-gradient(180deg, var(--paper) 0%, var(--coral-bg) 100%); }
.final-cta .cta-card {
    max-width: 760px;
    margin: 0 auto;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
.final-cta .cta-card::before {
    content: "";
    position: absolute;
    top: -150px; right: -150px;
    width: 320px; height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, oklch(0.85 0.15 25 / 0.35) 0%, transparent 70%);
}
.final-cta h2 { position: relative; }
.final-cta p { color: var(--ink-soft); font-size: 17px; margin-top: 14px; position: relative; }
.final-cta .cta-row { margin-top: 32px; justify-content: center; display: flex; gap: 12px; flex-wrap: wrap; position: relative; }

/* ============================================================================
 * 7. 页面专属：list (文章列表)
 * ============================================================================ */
.featured { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 56px; transition: all 0.2s; text-decoration: none; color: inherit; }
.featured:hover { border-color: var(--coral); box-shadow: var(--shadow-md); }
.featured-cover {
    background:
        radial-gradient(ellipse 400px 300px at 70% 30%, oklch(0.78 0.16 25 / 0.5), transparent 60%),
        radial-gradient(ellipse 400px 300px at 20% 80%, oklch(0.78 0.10 145 / 0.4), transparent 60%),
        var(--coral-bg);
    min-height: 360px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.featured-cover .ring {
    width: 70%; aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, oklch(0.92 0.10 25) 0%, oklch(0.70 0.17 25) 80%);
    box-shadow: 0 30px 60px -20px oklch(0.50 0.18 25 / 0.4);
    position: relative;
}
.featured-cover .ring::before, .featured-cover .ring::after { content: ""; position: absolute; inset: 8%; border-radius: 50%; border: 1px solid oklch(0.96 0.04 25 / 0.4); }
.featured-cover .ring::after { inset: 22%; }
.featured-body { padding: 56px 48px; display: flex; flex-direction: column; justify-content: center; }
.featured-label { display: inline-block; font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--coral-deep); margin-bottom: 14px; }
.featured h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.2; margin-bottom: 16px; }
.featured p { color: var(--ink-soft); font-size: 15.5px; line-height: 1.65; margin-bottom: 24px; }
.featured-meta { display: flex; gap: 16px; font-family: var(--font-mono); font-size: 12px; color: var(--muted); align-items: center; flex-wrap: wrap; }

.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 64px; }
.article-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: all 0.2s; display: flex; flex-direction: column; text-decoration: none; color: inherit; }
.article-card:hover { border-color: var(--coral); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.article-cover { aspect-ratio: 16 / 9; background: var(--coral-bg); position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.article-cover .glyph { font-family: var(--font-display); font-size: 72px; font-weight: 600; color: oklch(0.55 0.18 25 / 0.30); letter-spacing: -0.05em; }
.cover-1 { background: linear-gradient(135deg, oklch(0.92 0.06 25), oklch(0.85 0.10 50)); }
.cover-2 { background: linear-gradient(135deg, oklch(0.92 0.08 25), oklch(0.84 0.12 25)); }
.cover-3 { background: linear-gradient(135deg, oklch(0.86 0.10 145), oklch(0.92 0.05 145)); }
.cover-4 { background: linear-gradient(135deg, oklch(0.92 0.04 50), oklch(0.95 0.02 250)); }
.cover-5 { background: linear-gradient(135deg, oklch(0.92 0.08 25), oklch(0.95 0.03 250)); }
.cover-6 { background: linear-gradient(135deg, oklch(0.95 0.03 250), oklch(0.86 0.08 145)); }
.cover-7 { background: linear-gradient(135deg, oklch(0.90 0.10 25), oklch(0.85 0.12 60)); }
.cover-8 { background: linear-gradient(135deg, oklch(0.92 0.05 50), oklch(0.90 0.06 25)); }
.cover-9 { background: linear-gradient(135deg, oklch(0.94 0.04 145), oklch(0.92 0.06 25)); }

.article-body { padding: 22px 24px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.article-tag { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--coral-deep); }
.article-card h3 { font-size: 18px; line-height: 1.35; margin: 0; }
.article-card p { color: var(--ink-soft); font-size: 14px; line-height: 1.6; flex: 1; }
.article-meta { font-family: var(--font-mono); font-size: 12px; color: var(--muted); padding-top: 14px; border-top: 1px solid var(--line); margin-top: 6px; display: flex; justify-content: space-between; }

.pagination { display: flex; gap: 6px; justify-content: center; margin: 32px 0 96px; flex-wrap: wrap; }
.pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink-soft); font-size: 14px; font-family: var(--font-mono); text-decoration: none; transition: all 0.15s; }
.pagination a:hover { border-color: var(--coral); color: var(--coral-deep); }
.pagination .current,
.pagination .active a,
.pagination li.active a { background: var(--coral); color: white; border-color: var(--coral); }
.pagination ul { list-style: none; padding: 0; margin: 0; display: flex; gap: 6px; flex-wrap: wrap; }
.pagination li { list-style: none; }

.empty { text-align: center; padding: 80px 24px; color: var(--muted); font-size: 16px; }

/* ============================================================================
 * 8. 页面专属：detail (文章详情)
 * ============================================================================ */
.read-progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: transparent; z-index: 100; }
.read-progress .bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--coral) 0%, var(--coral-deep) 100%); transition: width 0.1s; }

.article-hero {
    background: linear-gradient(180deg, var(--coral-bg) 0%, var(--paper) 100%);
    border-bottom: 1px solid var(--line);
    padding: 56px 0 64px;
}
.article-meta-top { display: flex; gap: 12px; align-items: center; font-family: var(--font-mono); font-size: 13px; color: var(--muted); margin-bottom: 18px; flex-wrap: wrap; }
.article-meta-top .tag-mini { color: var(--coral-deep); background: var(--coral-soft); padding: 4px 10px; border-radius: 100px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; }
.article-hero h1 { max-width: 820px; font-size: clamp(30px, 4vw, 46px); line-height: 1.15; }
.article-author { display: flex; align-items: center; gap: 14px; margin-top: 28px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, oklch(0.85 0.12 25), oklch(0.62 0.18 25)); display: flex; align-items: center; justify-content: center; color: white; font-family: var(--font-display); font-weight: 600; font-size: 16px; }
.author-info { font-size: 14px; }
.author-info .name { color: var(--ink); font-weight: 500; }
.author-info .role { color: var(--muted); font-size: 12.5px; font-family: var(--font-mono); }

.article-layout { display: grid; grid-template-columns: 220px 1fr 220px; gap: 48px; padding: 56px 0; align-items: start; }
.article-toc { position: sticky; top: 96px; align-self: start; border-left: 1px solid var(--line); padding-left: 18px; }
.article-toc h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); font-family: var(--font-mono); margin-bottom: 14px; }
.article-toc ul { list-style: none; padding: 0; margin: 0; }
.article-toc li { margin: 0; padding: 0; }
.article-toc a { display: block; padding: 7px 0; font-size: 13.5px; color: var(--ink-soft); border-left: 2px solid transparent; padding-left: 10px; margin-left: -10px; transition: all 0.15s; text-decoration: none; }
.article-toc a:hover, .article-toc a.active { color: var(--coral-deep); border-left-color: var(--coral); }
.article-toc .toc-h3 a { padding-left: 22px; font-size: 13px; }

.article-content { font-family: "Noto Serif SC", "PingFang SC", "Microsoft YaHei", serif; font-size: 17px; line-height: 1.85; color: var(--ink); max-width: 100%; }
.article-content > p:first-of-type { font-size: 19px; color: var(--ink-soft); line-height: 1.7; margin-bottom: 32px; }
.article-content h2 { font-family: var(--font-display); font-size: 28px; margin-top: 56px; margin-bottom: 18px; scroll-margin-top: 92px; }
.article-content h3 { font-family: var(--font-display); font-size: 20px; margin-top: 32px; margin-bottom: 12px; scroll-margin-top: 92px; }
.article-content p { margin: 0 0 20px; color: var(--ink-soft); }
.article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 24px; color: var(--ink-soft); }
.article-content li { margin-bottom: 8px; }
.article-content code { font-family: var(--font-mono); font-size: 14px; background: var(--coral-bg); color: var(--coral-deep); padding: 2px 6px; border-radius: 4px; }
.article-content blockquote { margin: 28px 0; border-left: 3px solid var(--coral); color: var(--ink-soft); font-style: italic; background: var(--coral-bg); border-radius: 0 8px 8px 0; padding: 18px 20px; }
.article-content strong { color: var(--ink); font-weight: 600; }
.article-content a:not(.btn) { color: var(--coral-deep); border-bottom: 1px solid currentColor; text-decoration: none; }
.article-content a.btn { color: white; border-bottom: none; }
.article-content pre { background: var(--ink); color: oklch(0.92 0.02 25); padding: 20px; border-radius: 12px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.65; overflow-x: auto; margin: 24px 0; }
.article-content pre code { background: transparent; color: inherit; padding: 0; }
.article-content img { width: 100%; border-radius: 12px; margin: 28px 0; }

.article-aside { position: sticky; top: 96px; align-self: start; }
.share-block, .related-block { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 18px; }
.share-block h5, .related-block h5 { font-size: 12px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 14px; font-weight: 500; }
.share-icons { display: flex; gap: 8px; }
.share-icons a { width: 36px; height: 36px; background: var(--coral-bg); color: var(--coral-deep); border-radius: 10px; display: flex; align-items: center; justify-content: center; transition: all 0.15s; }
.share-icons a:hover { background: var(--coral); color: white; }
.share-icons svg { width: 16px; height: 16px; }
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.related-list li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.related-list a { font-size: 13.5px; color: var(--ink); font-weight: 500; line-height: 1.4; text-decoration: none; }
.related-list a:hover { color: var(--coral-deep); }
.related-list .meta { font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-top: 4px; }

.end-cta { margin: 56px 0; padding: 36px; background: linear-gradient(135deg, var(--coral-bg) 0%, var(--paper) 70%); border: 1px solid var(--coral); border-radius: var(--radius-lg); text-align: center; font-family: var(--font-body); }
.end-cta h3 { margin-bottom: 10px; font-size: 22px; }
.end-cta p { color: var(--ink-soft); margin-bottom: 20px; font-size: 15px; }

.nav-articles { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 48px 0 80px; }
.nav-link { border: 1px solid var(--line); padding: 22px 24px; border-radius: var(--radius); background: var(--paper); transition: all 0.15s; font-family: var(--font-body); text-decoration: none; color: inherit; }
.nav-link:hover { border-color: var(--coral); }
.nav-link .nav-dir { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 8px; }
.nav-link strong { color: var(--ink); font-size: 15px; font-weight: 500; line-height: 1.4; display: block; }
.nav-link.next { text-align: right; }

/* ============================================================================
 * 9. 页面专属：faq (常见问题)
 * ============================================================================ */
.faq-search { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 6px 6px 6px 18px; display: flex; align-items: center; gap: 10px; max-width: 560px; margin-top: 28px; box-shadow: var(--shadow-sm); }
.faq-search svg { width: 18px; height: 18px; color: var(--muted); flex-shrink: 0; }
.faq-search input { flex: 1; border: none; outline: none; background: transparent; font-size: 15px; color: var(--ink); font-family: var(--font-body); padding: 12px 0; }
.faq-search input::placeholder { color: var(--muted); }

.faq-section { margin-bottom: 56px; }
.faq-section h2 { font-size: 26px; margin-bottom: 12px; display: flex; align-items: center; gap: 12px; }
.faq-section h2::before { content: ""; width: 4px; height: 22px; background: var(--coral); border-radius: 2px; }
.faq-section .sub { color: var(--muted); margin-bottom: 24px; font-size: 15px; }

.qa-list { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.qa-item { border-bottom: 1px solid var(--line); }
.qa-item:last-child { border-bottom: none; }
.qa-q { width: 100%; background: transparent; border: none; text-align: left; padding: 22px 24px; cursor: pointer; font-family: var(--font-body); font-size: 16px; font-weight: 500; color: var(--ink); display: flex; justify-content: space-between; align-items: center; gap: 16px; transition: background 0.15s; }
.qa-q:hover { background: var(--coral-bg); }
.qa-q .chev { width: 20px; height: 20px; color: var(--muted); transition: transform 0.25s ease, color 0.15s; flex-shrink: 0; }
.qa-item.open .qa-q { background: var(--coral-bg); }
.qa-item.open .qa-q .chev { transform: rotate(180deg); color: var(--coral-deep); }
.qa-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.qa-item.open .qa-a { max-height: 2000px; }
.qa-a-inner { padding: 0 24px 24px; color: var(--ink-soft); font-size: 15px; line-height: 1.7; }
.qa-a-inner p { margin-bottom: 12px; }
.qa-a-inner p:last-child { margin-bottom: 0; }
.qa-a-inner ul { padding-left: 20px; margin: 10px 0; }
.qa-a-inner li { margin-bottom: 6px; }
.qa-a-inner code { font-family: var(--font-mono); font-size: 13px; background: var(--cream); padding: 2px 6px; border-radius: 4px; color: var(--coral-deep); }
.qa-a-inner a { color: var(--coral-deep); border-bottom: 1px solid currentColor; text-decoration: none; }

.still-need { background: var(--ink); color: white; border-radius: var(--radius-lg); padding: 56px 48px; margin: 64px 0 96px; display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; position: relative; overflow: hidden; }
.still-need::before {
    content: "";
    position: absolute;
    top: -100px; right: -100px;
    width: 280px; height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, oklch(0.50 0.18 25 / 0.3) 0%, transparent 70%);
}
.still-need h2 { color: white; font-size: 28px; position: relative; }
.still-need p { color: oklch(0.75 0.02 25); margin-top: 10px; max-width: 480px; position: relative; }
.still-need .actions { display: flex; gap: 12px; position: relative; flex-wrap: wrap; }

/* ============================================================================
 * 10. 页面专属：down (下载)
 * ============================================================================ */
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 24px; }
.dl-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; transition: all 0.2s; position: relative; overflow: hidden; }
.dl-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow-md); }
.dl-head { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 24px; }
.dl-icon { width: 60px; height: 60px; background: var(--coral-bg); color: var(--coral-deep); border-radius: 14px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.dl-icon svg { width: 30px; height: 30px; }
.dl-title h3 { font-size: 24px; margin-bottom: 4px; }
.dl-title .meta { font-family: var(--font-mono); font-size: 13px; color: var(--muted); letter-spacing: 0.04em; }
.dl-body { font-size: 14.5px; color: var(--ink-soft); margin-bottom: 28px; line-height: 1.65; }
.dl-specs { list-style: none; margin: 0 0 24px 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; font-size: 13px; }
.dl-specs li { display: flex; gap: 8px; align-items: center; color: var(--ink-soft); }
.dl-specs li svg { width: 14px; height: 14px; color: var(--leaf-deep); flex-shrink: 0; }
.dl-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.dl-meta-row { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 12px; color: var(--muted); letter-spacing: 0.04em; }
.dl-meta-row span:first-child { color: var(--leaf-deep); }

.sysreq { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 36px; }
.sysreq-card { border: 1px solid var(--line); padding: 24px; border-radius: var(--radius); background: var(--paper); }
.sysreq-card h4 { font-size: 15px; margin-bottom: 12px; }
.sysreq-card dl { margin: 0; font-size: 13px; }
.sysreq-card dt { color: var(--muted); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; margin-top: 10px; }
.sysreq-card dt:first-child { margin-top: 0; }
.sysreq-card dd { margin: 4px 0 0 0; color: var(--ink); font-weight: 500; }

.troubles { background: var(--cream); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.troubles-table { width: 100%; border-collapse: collapse; margin-top: 24px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.troubles-table td { padding: 16px 24px; border-bottom: 1px solid var(--line); font-size: 14.5px; color: var(--ink-soft); }
.troubles-table tr:last-child td { border-bottom: none; }
.troubles-table td:first-child { font-weight: 600; color: var(--ink); width: 180px; font-family: var(--font-mono); font-size: 13px; }
.troubles-table a { color: var(--coral-deep); }

/* ============================================================================
 * 11. 页面专属：privacy (隐私政策)
 * ============================================================================ */
.privacy-layout { display: grid; grid-template-columns: 240px 1fr; gap: 80px; padding: 56px 0 96px; }
.privacy-toc { position: sticky; top: 96px; align-self: start; border-left: 1px solid var(--line); padding-left: 18px; }
.privacy-toc h4 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); font-family: var(--font-mono); margin-bottom: 16px; font-weight: 500; }
.privacy-toc ul { list-style: none; padding: 0; margin: 0; }
.privacy-toc li { margin-bottom: 10px; }
.privacy-toc a { font-size: 14px; color: var(--ink-soft); transition: color 0.15s; text-decoration: none; }
.privacy-toc a:hover { color: var(--coral-deep); }

.privacy-content { max-width: 720px; }
.privacy-content h2 { font-size: 26px; margin-top: 56px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line); scroll-margin-top: 92px; }
.privacy-content h2:first-child,
.privacy-content > section:first-child h2 { margin-top: 0; }
.privacy-content h3 { font-size: 18px; margin-top: 28px; margin-bottom: 10px; }
.privacy-content p { margin-bottom: 16px; color: var(--ink-soft); font-size: 15.5px; line-height: 1.75; }
.privacy-content ul { padding-left: 22px; margin-bottom: 18px; color: var(--ink-soft); }
.privacy-content li { font-size: 15.5px; line-height: 1.75; margin-bottom: 8px; }
.privacy-content strong { color: var(--ink); font-weight: 600; }
.privacy-content code { font-family: var(--font-mono); font-size: 13px; background: var(--coral-bg); color: var(--coral-deep); padding: 2px 6px; border-radius: 4px; }
.privacy-content a { color: var(--coral-deep); border-bottom: 1px solid currentColor; text-decoration: none; }

.pledge { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 32px 0 48px; }
.pledge-card { border: 1px solid var(--line); padding: 22px; border-radius: var(--radius); background: var(--coral-bg); }
.pledge-icon { width: 36px; height: 36px; color: var(--coral-deep); margin-bottom: 14px; }
.pledge-card h4 { font-size: 15px; margin-bottom: 4px; font-family: var(--font-display); }
.pledge-card p { font-size: 13.5px; color: var(--ink-soft); margin: 0; line-height: 1.55; }

.ll-update { background: var(--cream); border-left: 3px solid var(--coral); padding: 16px 20px; border-radius: 0 8px 8px 0; margin-bottom: 32px; font-size: 14px; color: var(--ink-soft); }
.ll-update strong { color: var(--ink); }

.do-dont { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.do-block, .dont-block { border: 1px solid var(--line); padding: 22px; border-radius: var(--radius); background: var(--paper); }
.do-block b { color: var(--leaf-deep); font-family: var(--font-display); display: block; margin-bottom: 12px; font-size: 15px; }
.dont-block b { color: var(--coral-deep); font-family: var(--font-display); display: block; margin-bottom: 12px; font-size: 15px; }
.do-block ul, .dont-block ul { padding-left: 18px; margin: 0; }
.do-block li, .dont-block li { font-size: 14px; margin-bottom: 6px; }

/* ============================================================================
 * 12. 媒体查询（移动端适配）
 * ============================================================================ */
@media (max-width: 1100px) {
    .article-layout { grid-template-columns: 200px 1fr; }
    .article-aside { display: none; }
}

@media (min-width: 861px) and (max-width: 1080px) {
    .articles-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
    /* 公共 */
    .nav, .topbar-cta { display: none; }
    .menu-toggle { display: inline-flex; }
    .section { padding: 64px 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

    /* home */
    .hero { padding: 56px 0 72px; }
    .hero-grid { grid-template-columns: 1fr; gap: 56px; }
    .hero-visual { max-width: 360px; margin: 0 auto; padding: 30px 20px; }
    .features-grid { grid-template-columns: 1fr; }
    .nodes-grid { grid-template-columns: 1fr; gap: 40px; }
    .platforms-grid { grid-template-columns: 1fr 1fr; }
    .how-grid { grid-template-columns: 1fr; gap: 28px; }
    .articles-strip { grid-template-columns: 1fr; }
    .final-cta .cta-card { padding: 40px 28px; }
    .trust-row { gap: 20px; }

    /* list */
    .featured { grid-template-columns: 1fr; gap: 0; }
    .featured-cover { min-height: 220px; }
    .featured-body { padding: 32px 28px; }
    .articles-grid { grid-template-columns: 1fr; gap: 20px; }

    /* detail */
    .article-layout { grid-template-columns: 1fr; gap: 24px; padding: 32px 0; }
    .article-toc { display: none; }
    .article-content { font-size: 16px; }
    .nav-articles { grid-template-columns: 1fr; }

    /* faq */
    .still-need { grid-template-columns: 1fr; padding: 36px 28px; }

    /* down */
    .download-grid { grid-template-columns: 1fr; }
    .sysreq { grid-template-columns: 1fr 1fr; }
    .dl-card { padding: 28px; }
    .troubles-table td:first-child { width: 110px; }

    /* privacy */
    .privacy-layout { grid-template-columns: 1fr; gap: 32px; padding: 32px 0 64px; }
    .privacy-toc { display: none; }
    .pledge { grid-template-columns: 1fr; }
    .do-dont { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
}