/* S-Class · Premium Learning Hub (sor5-inspired design system) */
:root {
    --ink: #0a1628;
    --ink-mid: #132238;
    --ink-soft: #1e3348;
    --teal: #0d9488;
    --teal-bright: #14b8a6;
    --teal-dim: #0f766e;
    --teal-glow: rgba(20, 184, 166, 0.35);
    --gold: #d4a853;
    --gold-soft: rgba(212, 168, 83, 0.15);
    --white: #ffffff;
    --surface: #f4f7fb;
    --surface-2: #eef2f7;
    --line: rgba(15, 23, 42, 0.08);
    --line-strong: rgba(15, 23, 42, 0.12);
    --text: #0f172a;
    --muted: #64748b;
    --muted-light: #94a3b8;
    --max: 1180px;
    --nav-h: 72px;
    --r-sm: 10px;
    --r: 16px;
    --r-lg: 24px;
    --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.04);
    --shadow-md: 0 12px 40px rgba(10, 22, 40, 0.08);
    --shadow-lg: 0 24px 64px rgba(10, 22, 40, 0.12);
    --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    --display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
body {
    margin: 0;
    font-family: var(--font);
    font-size: clamp(15px, 2.5vw, 17px);
    line-height: 1.7;
    color: var(--text);
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
    -webkit-tap-highlight-color: rgba(13, 148, 136, 0.15);
}

/* ── Login Gate ── */
#login-gate {
    position: fixed; inset: 0; z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    background: var(--ink);
    padding:
        max(16px, env(safe-area-inset-top))
        max(16px, env(safe-area-inset-right))
        max(16px, env(safe-area-inset-bottom))
        max(16px, env(safe-area-inset-left));
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    min-height: 100dvh;
}
#login-gate::before {
    content: "";
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 20%, rgba(20,184,166,.18), transparent 55%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(212,168,83,.1), transparent 50%);
    pointer-events: none;
}
#login-gate.hidden { display: none !important; }
.gate-deco {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .35;
    pointer-events: none;
}
.gate-layout {
    position: relative;
    display: flex;
    align-items: center;
    gap: 48px;
    max-width: 920px;
    width: 100%;
    z-index: 1;
}
.gate-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 420px;
}
.gate-illustration {
    width: 100%;
    max-width: 380px;
    height: auto;
    border-radius: var(--r-lg);
    box-shadow: 0 24px 64px rgba(0,0,0,.35);
    animation: float-y 6s ease-in-out infinite;
}
@keyframes float-y {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.gate-panel {
    position: relative;
    width: 100%; max-width: 420px;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: var(--r-lg);
    padding: 40px 36px;
    box-shadow: var(--shadow-lg);
}
.gate-brand { margin-bottom: 28px; }
.gate-brand b {
    font-family: var(--display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.02em;
}
.gate-brand small {
    display: block;
    color: var(--muted);
    font-size: .82rem;
    margin-top: 6px;
    letter-spacing: .02em;
}
.gate-title {
    font-family: var(--display);
    font-size: 1.75rem;
    font-weight: 400;
    margin: 0 0 10px;
    color: var(--ink);
    letter-spacing: -0.02em;
}
.gate-desc { color: var(--muted); font-size: .92rem; margin: 0 0 24px; line-height: 1.6; }
.gate-form { display: flex; flex-direction: column; gap: 14px; }
.gate-input {
    padding: 15px 18px;
    border: 1px solid var(--line-strong);
    border-radius: var(--r-sm);
    font: inherit;
    font-size: 16px;
    width: 100%;
    background: var(--white);
    transition: border-color .2s, box-shadow .2s;
}
.gate-input:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 4px rgba(13,148,136,.12);
}
.gate-name-error { color: #dc2626; font-size: .82rem; margin: 0; }
.gate-btn {
    padding: 15px 20px;
    min-height: 48px;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--teal-dim), var(--teal-bright));
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .2s;
    box-shadow: 0 4px 20px var(--teal-glow);
}
.gate-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 28px var(--teal-glow);
}
.gate-hint { text-align: center; font-size: .78rem; color: var(--muted-light); margin: 16px 0 0; }

#main-app { display: none; }
#main-app.visible { display: block; }

/* ── Navigation ── */
.site-nav {
    position: sticky; top: 0; z-index: 200;
    height: var(--nav-h);
    background: rgba(255,255,255,.82);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: background .3s, border-color .3s, box-shadow .3s;
    padding-top: env(safe-area-inset-top, 0);
}
.site-nav.scrolled {
    background: rgba(255,255,255,.95);
    border-color: var(--line);
    box-shadow: var(--shadow-sm);
}
.site-nav .inner {
    max-width: var(--max);
    margin: 0 auto;
    height: 100%;
    padding: 0 28px;
    display: flex;
    align-items: center;
    gap: 32px;
}
.brand {
    text-decoration: none;
    color: var(--ink);
    font-family: var(--display);
    font-size: 1.35rem;
    font-weight: 400;
    flex-shrink: 0;
    letter-spacing: -0.02em;
}
.brand span { color: var(--teal); font-style: italic; }
.nav-menu {
    display: flex;
    gap: 2px;
    flex: 1;
    flex-wrap: wrap;
}
.nav-menu a {
    padding: 8px 14px;
    border-radius: 999px;
    text-decoration: none;
    color: var(--muted);
    font-size: .88rem;
    font-weight: 500;
    transition: color .2s, background .2s;
}
.nav-menu a:hover { color: var(--ink); background: var(--surface-2); }
.nav-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.welcome-name {
    font-size: .82rem;
    font-weight: 600;
    padding: 7px 14px;
    background: var(--surface-2);
    border-radius: 999px;
    color: var(--ink-soft);
}
.welcome-logout { font-size: .82rem; color: var(--muted); text-decoration: none; }
.welcome-logout:hover { color: var(--teal); }
.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg, var(--teal-dim), var(--teal-bright));
    color: #fff;
    font: inherit;
    font-weight: 600;
    font-size: .86rem;
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .2s;
    box-shadow: 0 4px 16px var(--teal-glow);
}
.btn-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--teal-glow);
}
.btn-nav-ghost {
    background: var(--white);
    color: var(--ink);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow-sm);
}
.btn-nav-ghost:hover {
    border-color: var(--teal);
    color: var(--teal-dim);
    box-shadow: var(--shadow-sm);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    margin-left: 4px;
    padding: 0;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    background: var(--white);
    cursor: pointer;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}
.nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform .25s var(--ease), opacity .25s;
}
html.nav-open .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
html.nav-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
html.nav-open .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
    z-index: 198;
    background: rgba(10, 22, 40, 0.42);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

/* 首页 / 学习目录切换 */
html.learning-mode #home-view { display: none; }
.learning-hub-panel[hidden] { display: none !important; }
html.learning-mode .learning-hub-panel { display: block !important; }
.learning-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--line);
}
.btn-back-hub {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    background: var(--white);
    color: var(--ink);
    font: inherit;
    font-size: .86rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color .2s, color .2s, box-shadow .2s;
}
.btn-back-hub:hover {
    border-color: var(--teal);
    color: var(--teal-dim);
    box-shadow: var(--shadow-sm);
}
.learning-toolbar-label {
    font-size: .88rem;
    font-weight: 600;
    color: var(--muted);
}

/* ── 课程特色展示（首页） ── */
.stage-showcase {
    padding: 52px 28px 64px;
    background: var(--surface);
}
.stage-showcase .wrap { max-width: var(--max); margin: 0 auto; }
.showcase-head {
    text-align: center;
    margin-bottom: 36px;
}
.showcase-head h2 {
    font-family: var(--display);
    font-size: clamp(1.85rem, 3.4vw, 2.45rem);
    font-weight: 700;
    margin: 0 0 12px;
    color: var(--ink);
    letter-spacing: -0.02em;
}
.showcase-head p {
    margin: 0 auto;
    max-width: 640px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.75;
}
.showcase-stage {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    margin-bottom: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.showcase-stage:last-child { margin-bottom: 0; }
.showcase-stage-intro {
    margin: 0;
    padding: 0 28px 18px;
    font-size: 1.02rem;
    color: var(--muted);
    line-height: 1.75;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, #fafbfc 0%, var(--white) 100%);
}
.showcase-stage-head {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 24px 28px;
    border-bottom: 1px solid var(--line);
    flex-wrap: wrap;
}
.showcase-stage-badge {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}
.showcase-primary .showcase-stage-badge { background: rgba(5,150,105,.1); color: #059669; }
.showcase-junior .showcase-stage-badge { background: rgba(37,99,235,.1); color: #2563eb; }
.showcase-senior .showcase-stage-badge { background: rgba(124,58,237,.1); color: #7c3aed; }
.showcase-abroad .showcase-stage-badge { background: rgba(220,38,38,.1); color: #dc2626; }
.showcase-extra .showcase-stage-badge { background: rgba(217,119,6,.1); color: #d97706; }
.showcase-stage-head h3 {
    font-family: var(--display);
    font-size: 1.45rem;
    font-weight: 700;
    margin: 0 0 4px;
    color: var(--ink);
}
.showcase-stage-head > div:nth-child(2) { flex: 1; min-width: 200px; }
.showcase-stage-head p { margin: 0; font-size: .98rem; color: var(--muted); }
.showcase-stage-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 999px;
    background: var(--ink);
    color: #fff;
    font: inherit;
    font-size: .84rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform .2s var(--ease), box-shadow .2s;
    margin-left: auto;
}
.showcase-stage-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.showcase-modules {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    padding: 20px 26px 24px;
}
.showcase-module {
    padding: 22px 20px;
    border-radius: var(--r-sm);
    border: 1px solid var(--line);
    background: linear-gradient(180deg, #fafbfc 0%, var(--white) 100%);
    transition: border-color .25s, box-shadow .25s, transform .25s var(--ease);
}
.showcase-module.featured {
    grid-column: span 1;
    border-color: rgba(13,148,136,.15);
    background: linear-gradient(145deg, #f8fafc 0%, #fff 55%, #f0fdfa 100%);
}
.showcase-module:hover {
    border-color: rgba(13,148,136,.28);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.module-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 12px;
}
.module-icon.teal { background: rgba(13,148,136,.12); color: var(--teal); }
.module-icon.blue { background: rgba(37,99,235,.12); color: #2563eb; }
.module-icon.sky { background: rgba(14,165,233,.12); color: #0ea5e9; }
.module-icon.green { background: rgba(5,150,105,.12); color: #059669; }
.module-icon.gold { background: rgba(212,168,83,.15); color: #b8860b; }
.module-icon.orange { background: rgba(255,159,67,.15); color: #ff9f43; }
.module-icon.purple { background: rgba(124,58,237,.12); color: #7c3aed; }
.module-icon.coral { background: rgba(255,107,107,.12); color: #ff6b6b; }
.module-icon.red { background: rgba(230,43,30,.1); color: #E62B1E; }
.showcase-module h4 {
    margin: 0 0 8px;
    font-size: 1.12rem;
    font-weight: 700;
    color: var(--ink);
}
.module-desc {
    margin: 0 0 14px;
    font-size: .96rem;
    color: var(--muted);
    line-height: 1.7;
}
.module-highlights {
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.module-highlights li {
    position: relative;
    padding-left: 16px;
    font-size: .92rem;
    color: var(--ink-soft, #1e3348);
    line-height: 1.6;
}
.module-highlights li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--teal);
    opacity: .65;
}
.module-highlights li strong {
    color: var(--ink);
    font-weight: 700;
}
.module-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 14px;
    border-top: 1px dashed var(--line);
}
.module-meta span {
    font-size: .76rem;
    font-weight: 700;
    letter-spacing: .03em;
    padding: 5px 11px;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--muted);
}
.module-tags {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.module-tags li {
    font-size: .68rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--muted);
    letter-spacing: .02em;
}

/* ── 教学 / 评价 / AI 核心能力 ── */
.platform-pillars {
    position: relative;
    padding: 52px 28px;
    background: var(--white);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}
.platform-pillars::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 92% 8%, rgba(37,99,235,.06), transparent 40%),
        radial-gradient(circle at 4% 92%, rgba(13,148,136,.08), transparent 42%);
    pointer-events: none;
}
.platform-pillars .wrap { max-width: var(--max); margin: 0 auto; position: relative; z-index: 1; }
.pillar-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}
.pillar-card {
    padding: 28px 26px 24px;
    border-radius: var(--r-lg);
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: box-shadow .3s, transform .3s var(--ease);
    overflow: hidden;
}
.pillar-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.pillar-teach { border-top: 3px solid #2563eb; }
.pillar-eval { border-top: 3px solid #059669; }
.pillar-ai { border-top: 3px solid #7c3aed; }
.pillar-loop { border-top: 3px solid var(--teal); }
.pillar-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 16px;
}
.pillar-teach .pillar-icon { background: rgba(37,99,235,.1); color: #2563eb; }
.pillar-eval .pillar-icon { background: rgba(5,150,105,.1); color: #059669; }
.pillar-ai .pillar-icon { background: rgba(124,58,237,.1); color: #7c3aed; }
.pillar-loop .pillar-icon { background: rgba(13,148,136,.1); color: var(--teal); }
.pillar-card h3 {
    font-family: var(--display);
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--ink);
    letter-spacing: -0.01em;
}
.pillar-lead {
    margin: 0 0 16px;
    font-size: 1rem;
    color: var(--muted);
    line-height: 1.7;
}
.pillar-card .module-highlights { margin-bottom: 18px; }
.pillar-card .module-meta { border-top-color: var(--line); }

.showcase-capability-banner {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 14px;
    margin-bottom: 28px;
    padding: 16px 20px;
    border-radius: var(--r);
    background: linear-gradient(135deg, #f0fdfa 0%, #eff6ff 50%, #faf5ff 100%);
    border: 1px solid rgba(13,148,136,.15);
}
.cap-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .92rem;
    font-weight: 600;
    color: var(--ink-soft, #1e3348);
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,.75);
    border: 1px solid rgba(255,255,255,.9);
}
.cap-item i { color: var(--teal); font-size: .85rem; }

.hero .lead strong { color: rgba(255,255,255,.95); font-weight: 600; }

/* ── 首页装饰与教学法视觉 ── */
.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(48px);
    pointer-events: none;
    z-index: 0;
}
.hero-blob--1 {
    width: 220px; height: 220px;
    top: 18%; right: 12%;
    background: rgba(20,184,166,.25);
}
.hero-blob--2 {
    width: 160px; height: 160px;
    bottom: 22%; left: 8%;
    background: rgba(212,168,83,.18);
}

/* ── 2026 中高考真题 Spotlight ── */
.exam-spotlight {
    padding: 40px 28px 48px;
    background:
        radial-gradient(ellipse 70% 120% at 100% 0%, rgba(212,168,83,.12), transparent 50%),
        radial-gradient(ellipse 60% 100% at 0% 100%, rgba(20,184,166,.1), transparent 45%),
        linear-gradient(165deg, #0f2744 0%, #1a3a5c 42%, #132238 100%);
}
.exam-spotlight .wrap {
    max-width: var(--max);
    margin: 0 auto;
}
.exam-spotlight-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    align-items: stretch;
}
.exam-spotlight-card {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    align-items: start;
    padding: 28px 28px 24px;
    border-radius: var(--r-lg);
    background: linear-gradient(135deg, rgba(255,255,255,.1) 0%, rgba(255,255,255,.04) 100%);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow:
        0 24px 64px rgba(0,0,0,.28),
        inset 0 1px 0 rgba(255,255,255,.12);
    overflow: hidden;
    min-height: 100%;
}
.exam-spotlight-card::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -10%;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212,168,83,.22), transparent 68%);
    pointer-events: none;
}
.exam-spotlight-card--het::before {
    background: radial-gradient(circle, rgba(20,184,166,.24), transparent 68%);
}
.exam-spotlight-card--het .exam-spotlight-tag { color: #5eead4; }
.exam-spotlight-card--het .exam-spotlight-year {
    background: linear-gradient(180deg, #99f6e4 0%, #14b8a6 50%, #0d9488 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 12px rgba(20,184,166,.35));
}
.exam-spotlight-new {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 2;
    padding: 6px 14px;
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .12em;
    color: #1a1208;
    background: linear-gradient(135deg, #fde68a 0%, #f59e0b 45%, #fbbf24 100%);
    border-radius: 999px;
    box-shadow: 0 4px 18px rgba(245,158,11,.45);
    animation: exam-spotlight-pulse 2.4s ease-in-out infinite;
}
@keyframes exam-spotlight-pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 4px 18px rgba(245,158,11,.45); }
    50% { transform: scale(1.05); box-shadow: 0 6px 24px rgba(245,158,11,.6); }
}
.exam-spotlight-content {
    position: relative;
    z-index: 1;
}
.exam-spotlight-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--teal-bright);
    margin-bottom: 12px;
}
.exam-spotlight-tag i { font-size: .9rem; }
.exam-spotlight-content h2 {
    font-family: var(--display);
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 700;
    color: #fff;
    margin: 0 0 16px;
    letter-spacing: -.02em;
}
.exam-spotlight-content > p {
    margin: 0 0 18px;
    color: rgba(255,255,255,.72);
    font-size: .95rem;
    max-width: 520px;
    line-height: 1.65;
}
.exam-spotlight-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    list-style: none;
    margin: 0 0 22px;
    padding: 0;
}
.exam-spotlight-features li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .86rem;
    font-weight: 500;
    color: rgba(255,255,255,.88);
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.1);
}
.exam-spotlight-features i { color: var(--teal-bright); font-size: .85rem; }
.exam-spotlight-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    font-size: .9rem;
    font-weight: 700;
    color: #0f2744;
    text-decoration: none;
    border-radius: 999px;
    background: linear-gradient(135deg, #fff 0%, #e0f2fe 100%);
    box-shadow: 0 8px 28px rgba(0,0,0,.22);
    transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.exam-spotlight-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(20,184,166,.35);
    color: #0a1628;
}
.exam-spotlight-cta i { transition: transform .25s var(--ease); }
.exam-spotlight-cta:hover i { transform: translateX(4px); }
.exam-spotlight-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 0;
    min-width: 0;
    text-align: left;
}
.exam-spotlight-year {
    font-family: var(--display);
    font-size: clamp(2.4rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(180deg, #fde68a 0%, #f59e0b 50%, #d97706 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 12px rgba(245,158,11,.35));
}
.exam-spotlight-paper {
    margin-top: 0;
    font-size: .86rem;
    font-weight: 600;
    letter-spacing: .06em;
    color: rgba(255,255,255,.65);
}
@media (max-width: 900px) {
    .exam-spotlight-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .exam-spotlight-card {
        padding: 28px 24px 24px;
        gap: 14px;
    }
    .exam-spotlight-year { font-size: 2.4rem; }
    .exam-spotlight-new { top: 16px; right: 16px; }
}

.teach-flow {
    position: relative;
    padding: 48px 28px;
    background:
        radial-gradient(ellipse 50% 80% at 0% 50%, rgba(13,148,136,.06), transparent 55%),
        linear-gradient(180deg, var(--white) 0%, var(--surface) 100%);
    overflow: hidden;
}
.teach-flow-deco {
    position: absolute;
    right: -2%;
    top: 50%;
    transform: translateY(-50%);
    width: min(360px, 38vw);
    opacity: .14;
    pointer-events: none;
}
.teach-flow .wrap { max-width: var(--max); margin: 0 auto; position: relative; }
.teach-flow-head {
    text-align: center;
    margin-bottom: 32px;
}
.teach-flow-head h2 {
    font-family: var(--display);
    font-size: clamp(1.6rem, 3vw, 2rem);
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--ink);
}
.teach-flow-head p {
    margin: 0;
    color: var(--muted);
    font-size: .98rem;
}
.teach-flow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.teach-flow-steps li {
    position: relative;
    padding: 20px 16px 18px;
    border-radius: var(--r);
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    text-align: center;
}
.teach-flow-steps li::after {
    content: "→";
    position: absolute;
    right: -14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--teal);
    font-size: 1.1rem;
    font-weight: 700;
    z-index: 2;
}
.teach-flow-steps li:last-child::after { display: none; }
.flow-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teal-dim), var(--teal-bright));
    color: #fff;
    font-weight: 700;
    font-size: .9rem;
    margin-bottom: 10px;
}
.teach-flow-steps h3 {
    margin: 0 0 6px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
}
.teach-flow-steps p {
    margin: 0;
    font-size: .84rem;
    color: var(--muted);
    line-height: 1.55;
}

.pillar-visual {
    width: calc(100% + 52px);
    height: 140px;
    object-fit: cover;
    border-radius: var(--r-sm) var(--r-sm) 0 0;
    margin: -28px -26px 18px;
    display: block;
}
.is-carousel .pillar-card .module-highlights {
    margin-bottom: 14px;
}
.is-carousel .pillar-card .module-highlights li {
    font-size: .88rem;
    line-height: 1.55;
}

.stage-showcase {
    background:
        radial-gradient(ellipse 60% 40% at 50% 0%, rgba(13,148,136,.05), transparent 60%),
        var(--surface);
}
.stage-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
}
@media (min-width: 1100px) {
    .stage-tiles { grid-template-columns: repeat(5, 1fr); }
}
.stage-tile {
    position: relative;
    border-radius: var(--r);
    overflow: hidden;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: transform .25s var(--ease), box-shadow .25s;
}
.stage-tile:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.stage-tile-media {
    height: 120px;
    overflow: hidden;
}
.stage-tile-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .4s var(--ease);
}
.stage-tile:hover .stage-tile-media img { transform: scale(1.04); }
.stage-tile-body {
    padding: 16px 18px 18px;
}
.stage-tile-body h3 {
    margin: 0 0 6px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink);
}
.stage-tile-body p {
    margin: 0 0 14px;
    font-size: .84rem;
    color: var(--muted);
    line-height: 1.55;
}
.stage-tile-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 999px;
    background: var(--ink);
    color: #fff;
    font: inherit;
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s, transform .2s;
}
.stage-tile-btn:hover {
    background: var(--teal-dim);
    transform: translateY(-1px);
}
.showcase-modules {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 16px 22px 22px;
}
.showcase-module {
    padding: 16px 18px;
}
.showcase-module .module-desc,
.showcase-module .module-highlights { display: none; }
.showcase-module h4 {
    font-size: .98rem;
    margin-bottom: 10px;
}
.showcase-module .module-meta { padding-top: 0; border-top: none; }
.showcase-stage-intro { display: none; }
.showcase-capability-banner { display: none; }

@media (max-width: 900px) {
    .teach-flow-steps { grid-template-columns: repeat(2, 1fr); }
    .teach-flow-steps li:nth-child(2)::after { display: none; }
}
@media (max-width: 520px) {
    .teach-flow-steps { grid-template-columns: 1fr; }
    .teach-flow-steps li::after { display: none; }
    .stage-tiles { grid-template-columns: 1fr; }
    .is-carousel .carousel-slide { flex-basis: min(100%, 100%); }
}

/* ── Hero ── */
.hero {
    position: relative;
    background: var(--ink);
    color: #fff;
    overflow: hidden;
    padding: 72px 28px 88px;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 70% 80% at 10% 20%, rgba(20,184,166,.22), transparent 50%),
        radial-gradient(ellipse 50% 60% at 90% 60%, rgba(212,168,83,.12), transparent 45%),
        linear-gradient(160deg, #0a1628 0%, #0f2744 40%, #0d3d38 100%);
    pointer-events: none;
}
.hero-bg::after {
    content: "";
    position: absolute; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: .6;
}
.hero-texture {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .18;
    mix-blend-mode: soft-light;
    pointer-events: none;
}
.hero .wrap {
    position: relative;
    max-width: var(--max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
    align-items: center;
}
.hero-content { max-width: 580px; }
.hero .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px 6px 8px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: rgba(255,255,255,.85);
    margin-bottom: 24px;
}
.hero .eyebrow::before {
    content: "";
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--teal-bright);
    box-shadow: 0 0 12px var(--teal-bright);
}
.hero h1 {
    font-family: var(--display);
    font-size: clamp(2.2rem, 4.5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 20px;
    letter-spacing: -0.02em;
}
.hero h1 em {
    font-style: normal;
    color: var(--teal-bright);
    font-weight: 800;
}
.hero .lead {
    color: rgba(255,255,255,.72);
    font-size: 1.12rem;
    line-height: 1.75;
    margin: 0 0 32px;
    max-width: 520px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 40px;
}
.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    min-height: 48px;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--teal-bright), #2dd4bf);
    color: var(--ink);
    font: inherit;
    font-weight: 700;
    font-size: .95rem;
    cursor: pointer;
    text-decoration: none;
    transition: transform .25s var(--ease), box-shadow .25s;
    box-shadow: 0 8px 32px rgba(20,184,166,.35);
}
.btn-hero-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(20,184,166,.45);
}
.btn-hero-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    min-height: 48px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.25);
    background: rgba(255,255,255,.06);
    color: rgba(255,255,255,.9);
    font: inherit;
    font-weight: 600;
    font-size: .92rem;
    cursor: pointer;
    text-decoration: none;
    transition: background .2s, border-color .2s;
}
.btn-hero-ghost:hover {
    background: rgba(255,255,255,.12);
    border-color: rgba(255,255,255,.4);
}
.hero-features {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 20px;
}
.hero-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: .86rem;
    color: rgba(255,255,255,.65);
    line-height: 1.5;
}
.hero-features li i {
    color: var(--teal-bright);
    margin-top: 3px;
    font-size: .75rem;
}
.hero-visual {
    position: relative;
    min-height: 360px;
}
.hero-figure {
    margin: 0;
    position: relative;
    z-index: 2;
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: 0 32px 80px rgba(0,0,0,.35);
    border: 1px solid rgba(255,255,255,.12);
}
.hero-figure img {
    display: block;
    width: 100%;
    height: auto;
    vertical-align: middle;
}
.hero-stat-float {
    position: absolute;
    bottom: -12px;
    left: -16px;
    right: -16px;
    display: flex;
    gap: 12px;
    justify-content: center;
    z-index: 3;
}
.hero-stat-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(255,255,255,.1);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,.15);
    font-size: .82rem;
    color: rgba(255,255,255,.75);
}
.hero-stat-pill strong {
    font-family: var(--display);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--teal-bright);
}
.hero-glow {
    position: absolute;
    width: 280px; height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--teal-glow), transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
}

/* ── Section tags (catalog 等) ── */
.section-tag {
    display: inline-block;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 10px;
}

/* ── Value Strip ── */
.value-strip {
    position: relative;
    background: var(--white);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 56px 28px;
    overflow: hidden;
}
.value-strip-deco {
    position: absolute;
    top: 50%;
    right: -4%;
    width: min(480px, 45vw);
    height: auto;
    transform: translateY(-50%);
    opacity: .12;
    pointer-events: none;
}
.value-strip .wrap {
    position: relative;
    max-width: var(--max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.value-item {
    text-align: center;
    padding: 0 12px;
}
.value-item i {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    background: linear-gradient(135deg, rgba(13,148,136,.12), rgba(13,148,136,.04));
    color: var(--teal);
    margin-bottom: 14px;
}
.value-item h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--ink);
}
.value-item p {
    margin: 0;
    font-size: .92rem;
    color: var(--muted);
    line-height: 1.65;
}

/* ── Catalog ── */
.catalog {
    padding: 72px 28px 80px;
    background: var(--surface);
}
.catalog .wrap { max-width: var(--max); margin: 0 auto; }
.catalog-head {
    text-align: center;
    margin-bottom: 32px;
}
.catalog-head .section-tag { margin-bottom: 10px; }
.catalog-head h2 {
    font-family: var(--display);
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 400;
    margin: 0 0 10px;
    color: var(--ink);
    letter-spacing: -0.02em;
}
.catalog-head p {
    margin: 0 auto;
    color: var(--muted);
    font-size: .95rem;
    max-width: 520px;
}

.stage-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin-bottom: 48px;
    padding: 6px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    position: sticky;
    top: calc(var(--nav-h) + 12px);
    z-index: 50;
}
.stage-nav a {
    padding: 10px 22px;
    border-radius: 999px;
    text-decoration: none;
    color: var(--muted);
    font-size: .88rem;
    font-weight: 600;
    transition: all .25s var(--ease);
}
.stage-nav a:hover {
    color: var(--ink);
    background: var(--surface-2);
}
.stage-nav a.active {
    background: var(--ink);
    color: #fff;
    box-shadow: 0 4px 12px rgba(10,22,40,.15);
}

/* ── Age Stages ── */
.age-stage {
    margin-bottom: 40px;
    scroll-margin-top: calc(var(--nav-h) + 80px);
}
.age-stage-head {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 28px 32px;
    border-radius: var(--r) var(--r) 0 0;
    background: var(--white);
    border: 1px solid var(--line);
    border-bottom: none;
    position: relative;
    overflow: hidden;
}
.age-stage-head::before {
    content: "";
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--stage-accent, var(--teal));
}
.age-stage-head .stage-badge {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background: var(--stage-bg, rgba(13,148,136,.1));
    color: var(--stage-accent, var(--teal));
    flex-shrink: 0;
}
.age-stage-head h2 {
    font-family: var(--display);
    font-size: 1.35rem;
    font-weight: 400;
    margin: 0 0 4px;
    color: var(--ink);
    letter-spacing: -0.01em;
}
.age-stage-head p { margin: 0; font-size: .86rem; color: var(--muted); }
.age-stage-head.age-primary { --stage-accent: #059669; --stage-bg: rgba(5,150,105,.1); }
.age-stage-head.age-junior { --stage-accent: #2563eb; --stage-bg: rgba(37,99,235,.1); }
.age-stage-head.age-senior { --stage-accent: #7c3aed; --stage-bg: rgba(124,58,237,.1); }
.age-stage-head.age-abroad { --stage-accent: #dc2626; --stage-bg: rgba(220,38,38,.1); }
.age-stage-head.age-extra { --stage-accent: #d97706; --stage-bg: rgba(217,119,6,.1); }

.age-stage-body {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 0 0 var(--r) var(--r);
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

/* ── Module Accordion ── */
.section-row {
    margin-bottom: 10px;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    overflow: hidden;
    background: var(--surface);
    transition: box-shadow .25s;
}
.section-row:last-child { margin-bottom: 0; }
.section-row.section-open {
    box-shadow: var(--shadow-sm);
    border-color: var(--line-strong);
}
.section-label {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    cursor: pointer;
    background: var(--white);
    border: none;
    transition: background .2s;
}
.section-label:hover { background: #fafbfc; }
.section-label h2 {
    margin: 0 !important;
    font-size: .98rem !important;
    font-weight: 700 !important;
    color: var(--ink) !important;
    letter-spacing: -0.01em;
}
.section-label p { margin: 4px 0 0; font-size: .82rem; color: var(--muted); line-height: 1.45; }
.section-icon {
    width: 44px; height: 44px;
    flex-shrink: 0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    background: linear-gradient(135deg, rgba(13,148,136,.12), rgba(13,148,136,.04)) !important;
    color: var(--teal) !important;
}
.toggle-arrow {
    margin-left: auto;
    width: 32px; height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--surface-2);
    color: var(--muted-light);
    font-size: .78rem;
    transition: transform .3s var(--ease), background .2s;
}
.section-row.section-open .section-label { border-bottom: 1px solid var(--line); }
.section-row.section-open .toggle-arrow {
    transform: rotate(180deg);
    background: var(--ink);
    color: #fff;
}

.content-grid {
    display: none;
    padding: 20px;
    gap: 12px;
    grid-template-columns: repeat(2, 1fr);
    background: linear-gradient(180deg, #fafbfc 0%, var(--surface) 100%);
}
.section-row.section-open .content-grid { display: grid; }

.card-base {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    transition: border-color .25s, box-shadow .25s, transform .25s var(--ease);
}
.card-base:hover {
    border-color: rgba(13,148,136,.25);
    box-shadow: var(--shadow-sm);
}

div.unit-card {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    min-height: 76px;
    cursor: pointer;
}
div.unit-card.active {
    grid-column: 1 / -1;
    border-color: rgba(13,148,136,.3);
    background: linear-gradient(135deg, #f0fdfa, #f8fafc);
    box-shadow: var(--shadow-sm);
}
div.unit-card.active-teal {
    border-color: rgba(5,150,105,.3) !important;
    background: linear-gradient(135deg, #ecfdf5, #f8fafc) !important;
}
div.unit-card .unit-number { font-size: .92rem; font-weight: 700; color: var(--teal); }
div.unit-card .unit-title { font-size: .84rem; color: var(--muted); margin-top: 3px; }
div.unit-card .unit-desc { font-size: .78rem !important; color: var(--muted-light) !important; margin-top: 3px; }
div.unit-card > .fa-chevron-down {
    color: var(--muted-light) !important;
    align-self: flex-end;
    margin-top: 10px;
    font-size: .82rem;
}
.unit-content-body {
    display: none;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--line-strong);
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 10px;
}
div.unit-card.active .unit-content-body { display: grid; }

/* Link cards */
.content-grid > a.card-base.unit-card {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 16px;
    padding: 18px 20px !important;
    min-height: auto !important;
    text-decoration: none !important;
    color: inherit !important;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.content-grid > a.unit-card::before {
    content: "";
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--teal);
    transform: scaleY(0);
    transition: transform .25s var(--ease);
}
.content-grid > a.unit-card:hover::before { transform: scaleY(1); }
.content-grid > a.unit-card:hover {
    border-color: rgba(13,148,136,.35);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.content-grid > a.unit-card .link-card-body,
.content-grid > a.unit-card > div:first-child:not(.link-card-body) { flex: 1; min-width: 0; }
.content-grid > a.unit-card .unit-number {
    display: inline-block;
    font-size: .68rem !important;
    font-weight: 700 !important;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(13,148,136,.1) !important;
    color: var(--teal-dim) !important;
    margin-bottom: 8px;
}
.content-grid > a.unit-card.card-teal .unit-number {
    background: rgba(5,150,105,.1) !important;
    color: #059669 !important;
}
.content-grid > a.unit-card .unit-title {
    display: block;
    font-size: .95rem !important;
    font-weight: 700 !important;
    color: var(--ink) !important;
    margin-top: 0 !important;
    line-height: 1.35;
}
.content-grid > a.unit-card .unit-desc {
    display: block;
    font-size: .8rem !important;
    color: var(--muted) !important;
    margin-top: 4px !important;
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.content-grid > a.unit-card > .fa-arrow-right {
    flex-shrink: 0;
    width: 38px; height: 38px;
    display: flex !important;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--surface-2);
    color: var(--muted) !important;
    font-size: .82rem !important;
    align-self: center !important;
    margin: 0 !important;
    transition: background .25s, color .25s, transform .25s var(--ease);
}
.content-grid > a.unit-card:hover > .fa-arrow-right {
    background: var(--teal);
    color: #fff !important;
    transform: translateX(2px);
}

.universal-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: var(--r-sm);
    background: var(--white);
    border: 1px solid var(--line);
    text-decoration: none;
    color: var(--text);
    transition: border-color .2s, background .2s, transform .2s var(--ease);
}
.universal-item:hover {
    border-color: rgba(13,148,136,.3);
    background: #f0fdfa;
    transform: translateX(3px);
}
.item-icon-box {
    width: 36px; height: 36px;
    flex-shrink: 0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(13,148,136,.1) !important;
    color: var(--teal) !important;
    font-size: .85rem;
}
.item-text h4 { margin: 0 0 3px; font-size: .86rem; font-weight: 700; line-height: 1.35; color: var(--ink); }
.item-text p { margin: 0; font-size: .76rem; color: var(--muted); line-height: 1.45; }
.item-title-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.item-title-row h4 { margin: 0; font-size: .88rem; font-weight: 700; }
.psle-proof-badge {
    font-size: .58rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 999px;
    color: #9d174d;
    background: #fce7f3;
    border: 1px solid #f9a8d4;
}
.highlight-gold { background: #fffbeb; border-color: #fde68a; }

.media-card {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}
.media-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.media-thumb { width: 100%; height: 140px; object-fit: cover; }
.media-info { padding: 16px; }
.media-info h4 { margin: 0 0 5px; font-size: .88rem; font-weight: 700; color: var(--ink); }
.media-info p { margin: 0; font-size: .78rem; color: var(--muted); line-height: 1.45; }

.resource-card {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 18px;
    text-decoration: none;
    color: inherit;
    background: linear-gradient(135deg, #faf5ff, #f8fafc);
}
.resource-card:hover { border-color: rgba(124,58,237,.25); }
.resource-card h3 { margin: 0; font-size: 1rem; font-weight: 700; color: var(--ink); }
.card-span-2 { grid-column: span 2; }
.border-teal, .border-yellow, .border-orange, .border-blue,
.border-red, .border-purple, .border-coral { border-left: none; }

/* ── Footer ── */
.site-footer {
    background: var(--ink);
    color: rgba(255,255,255,.55);
    padding: 64px 28px 32px;
    position: relative;
    overflow: visible;
}
.site-footer::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 50% at 80% 0%, rgba(20,184,166,.12), transparent 55%);
    pointer-events: none;
}
.footer-grid {
    position: relative;
    max-width: var(--max);
    margin: 0 auto 36px;
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 150px;
    gap: 40px;
}
.footer-brand b {
    display: block;
    font-family: var(--display);
    font-size: 1.25rem;
    font-weight: 400;
    color: #fff;
    margin-bottom: 12px;
}
.footer-brand p { margin: 0; font-size: .88rem; line-height: 1.7; max-width: 320px; }
.footer-col h4 {
    color: #fff;
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    margin: 0 0 16px;
}
.footer-col a {
    display: block;
    color: rgba(255,255,255,.45);
    text-decoration: none;
    font-size: .88rem;
    margin-bottom: 8px;
    transition: color .2s;
}
.footer-col a:hover { color: var(--teal-bright); }

.footer-qr {
    position: relative;
    z-index: 5;
}
.qr-zoom-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: 10px;
    cursor: zoom-in;
    outline: none;
}
.qr-zoom-wrap img {
    width: 120px;
    height: 120px;
    border-radius: var(--r-sm);
    background: #fff;
    padding: 6px;
    display: block;
    box-shadow: 0 8px 24px rgba(0,0,0,.2);
    transition:
        transform .4s var(--ease),
        box-shadow .4s var(--ease);
    transform-origin: bottom right;
    will-change: transform;
}
.qr-zoom-wrap:hover img,
.qr-zoom-wrap:focus-visible img {
    transform: scale(2.35);
    box-shadow:
        0 24px 56px rgba(0,0,0,.45),
        0 0 0 4px rgba(255,255,255,.12);
    z-index: 100;
    position: relative;
}
@media (hover: none) {
    .qr-zoom-wrap:active img,
    .qr-zoom-wrap:focus img {
        transform: scale(2.35);
        box-shadow:
            0 24px 56px rgba(0,0,0,.45),
            0 0 0 4px rgba(255,255,255,.12);
        z-index: 100;
        position: relative;
    }
}
.footer-qr p { margin: 0; font-size: .74rem; line-height: 1.5; }
.footer-bottom {
    position: relative;
    max-width: var(--max);
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.08);
    text-align: center;
    font-size: .8rem;
    color: rgba(255,255,255,.3);
}
.footer-bottom a { color: rgba(255,255,255,.45); text-decoration: none; }
.footer-bottom a:hover { color: var(--teal-bright); }

/* ── CTA Banner ── */
.cta-banner {
    background: linear-gradient(135deg, var(--ink-mid), var(--ink-soft));
    padding: 56px 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: "";
    position: absolute; inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(20,184,166,.15), transparent 60%);
}
.cta-banner .wrap {
    position: relative;
    max-width: 640px;
    margin: 0 auto;
}
.cta-banner h2 {
    font-family: var(--display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 400;
    color: #fff;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
}
.cta-banner p {
    color: rgba(255,255,255,.65);
    margin: 0 0 28px;
    font-size: .95rem;
}
.cta-banner .btn-hero-primary { margin: 0 auto; }

/* ── 卡片横向轮播（首页） ── */
.pillar-grid.is-carousel,
.showcase-modules.is-carousel {
    display: block;
    padding: 16px 20px 12px;
}

.card-carousel-viewport {
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    border-radius: var(--r-sm);
}
.card-carousel-viewport::-webkit-scrollbar { width: 0; height: 0; display: none; }

.card-carousel-track {
    display: flex;
    gap: 18px;
    padding: 4px 2px 12px;
}

.is-carousel .carousel-slide {
    flex: 0 0 min(100%, 540px);
    scroll-snap-align: start;
    scroll-snap-stop: always;
    overflow: hidden;
}

.is-carousel .pillar-card,
.is-carousel .showcase-module {
    height: 100%;
    margin: 0;
}

.is-carousel .showcase-module:hover,
.is-carousel .pillar-card:hover {
    transform: none;
}

.card-carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 8px 0 4px;
    flex-wrap: wrap;
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    background: var(--white);
    color: var(--ink);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
    transition: background .2s, border-color .2s, transform .2s var(--ease);
    box-shadow: var(--shadow-sm);
}
.carousel-btn:hover {
    background: var(--surface-2);
    border-color: var(--teal);
    color: var(--teal-dim);
    transform: translateY(-1px);
}

.carousel-toggle.is-playing {
    color: var(--teal-dim);
    border-color: rgba(13,148,136,.35);
    background: #f0fdfa;
}

.carousel-dots {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 6px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    border: none;
    padding: 0;
    background: var(--line-strong);
    cursor: pointer;
    transition: width .25s var(--ease), background .25s;
}
.carousel-dot.is-active {
    width: 28px;
    background: linear-gradient(90deg, var(--teal-dim), var(--teal-bright));
}

@media (min-width: 900px) {
    .is-carousel .carousel-slide {
        flex-basis: min(calc(100% - 40px), 640px);
    }
}

/* ── Responsive (index.html · 手机 / 平板 / 触屏) ── */
@media (max-width: 1024px) {
    .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { min-height: auto; max-width: 520px; margin: 0 auto; }
    .value-strip .wrap { grid-template-columns: repeat(2, 1fr); }
    .pillar-grid { grid-template-columns: 1fr; }
    .pillar-grid.is-carousel,
    .showcase-modules.is-carousel { padding: 14px 16px 10px; }
    .gate-layout { flex-direction: column; gap: 32px; }
    .gate-visual { max-width: 320px; }
    .content-grid { grid-template-columns: 1fr; }
    .section-row.section-open .content-grid { grid-template-columns: 1fr; }
    .showcase-modules:not(.is-carousel) { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    :root { --nav-h: 64px; }

    .site-nav .inner {
        padding: 0 max(16px, env(safe-area-inset-left)) 0 max(16px, env(safe-area-inset-right));
        gap: 12px;
    }

    .nav-toggle { display: inline-flex; }

    .nav-menu {
        position: fixed;
        top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 199;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        margin: 0;
        padding:
            16px
            max(16px, env(safe-area-inset-right))
            max(24px, env(safe-area-inset-bottom))
            max(16px, env(safe-area-inset-left));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(18px) saturate(180%);
        -webkit-backdrop-filter: blur(18px) saturate(180%);
        border-top: 1px solid var(--line);
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transform: translateX(100%);
        visibility: hidden;
        transition: transform .32s var(--ease), visibility .32s;
    }
    html.nav-open .nav-menu {
        transform: translateX(0);
        visibility: visible;
    }
    html.nav-open .nav-overlay { display: block; }

    .nav-menu a {
        padding: 14px 16px;
        min-height: 48px;
        display: flex;
        align-items: center;
        font-size: 1rem;
        border-radius: var(--r-sm);
    }

    .nav-right {
        gap: 8px;
    }
    .btn-nav {
        min-height: 44px;
        padding: 10px 16px;
        font-size: .82rem;
    }

    .gate-visual { display: none; }
    .gate-panel {
        max-width: 100%;
        padding: 28px 22px;
    }

    .hero-features { grid-template-columns: 1fr; }
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-actions .btn-hero-primary,
    .hero-actions .btn-hero-ghost {
        width: 100%;
        justify-content: center;
    }

    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stage-nav {
        width: 100%;
        max-width: 100%;
        border-radius: var(--r);
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x proximity;
        scrollbar-width: none;
    }
    .stage-nav::-webkit-scrollbar { display: none; }
    .stage-nav a {
        white-space: nowrap;
        flex-shrink: 0;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        scroll-snap-align: start;
    }

    .value-strip-deco { opacity: .08; width: 60vw; }
    .platform-pillars { padding: 48px 20px; }
    .teach-flow { padding: 40px 20px; }
    .showcase-capability-banner { gap: 8px; padding: 14px; }
    .cap-item { font-size: .74rem; padding: 5px 10px; }

    .section-label {
        padding: 16px 18px;
        min-height: 56px;
        -webkit-tap-highlight-color: transparent;
    }
    .section-label .label-text-group { min-width: 0; }
    .section-label h2 { font-size: .92rem !important; }
    .section-label p {
        font-size: .78rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .toggle-arrow {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .content-grid > a.unit-card {
        min-height: 56px;
        padding: 16px 18px;
    }

    .learning-toolbar {
        flex-wrap: wrap;
        gap: 12px;
    }
    .learning-toolbar-label {
        flex: 1 1 100%;
    }

    .age-stage-head {
        flex-wrap: wrap;
        gap: 12px;
        padding: 18px 16px;
    }
}
@media (max-width: 520px) {
    .value-strip .wrap { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .card-span-2 { grid-column: auto; }
    .nav-right .welcome-name { display: none; }
    .brand { font-size: 1.2rem; }

    .hero {
        padding:
            max(40px, env(safe-area-inset-top))
            max(16px, env(safe-area-inset-right))
            56px
            max(16px, env(safe-area-inset-left));
    }
    .hero h1 { font-size: clamp(1.85rem, 8vw, 2.35rem); }
    .hero .lead { font-size: 1rem; margin-bottom: 24px; }

    .catalog {
        padding:
            40px max(16px, env(safe-area-inset-right))
            56px max(16px, env(safe-area-inset-left));
    }
    .stage-showcase {
        padding:
            40px max(16px, env(safe-area-inset-right))
            56px max(16px, env(safe-area-inset-left));
    }
    .cta-banner {
        padding:
            44px max(16px, env(safe-area-inset-right))
            44px max(16px, env(safe-area-inset-left));
    }

    .showcase-stage-head { padding: 18px 16px; }
    .showcase-modules:not(.is-carousel) { grid-template-columns: 1fr; padding: 16px; }
    .is-carousel .carousel-slide { flex-basis: min(100%, 100%); }
    .showcase-module.featured { grid-column: span 1; }
    .showcase-stage-intro { padding: 0 16px 16px; font-size: .88rem; }
    .showcase-stage-btn { margin-left: 0; width: 100%; justify-content: center; min-height: 44px; }
    .hero-stat-float { position: static; margin-top: 16px; flex-wrap: wrap; justify-content: center; }

    .exam-spotlight-card { padding: 24px 18px 20px; }
    .exam-spotlight-cta { width: 100%; justify-content: center; }

    div.unit-card { min-height: 56px; }
    .carousel-btn {
        width: 44px;
        height: 44px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .content-grid > a.unit-card:hover,
    .stage-tile:hover,
    .pillar-card:hover,
    .showcase-module:hover {
        transform: none;
    }
    .btn-nav:hover,
    .btn-hero-primary:hover,
    .gate-btn:hover {
        transform: none;
    }
    .content-grid > a.unit-card:active {
        background: var(--surface-2);
        border-color: rgba(13, 148, 136, 0.22);
    }
    .section-label:active {
        background: #f3f6f9;
    }
}

@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;
    }
    .nav-menu { transition: none; }
}