:root {
  --ink: #102a43;
  --ink-2: #243b53;
  --muted: #627d98;
  --paper: #f7f8f3;
  --white: #ffffff;
  --line: #dbe4e8;
  --lime: #b7f34a;
  --mint: #55d6be;
  --cyan: #38bdf8;
  --orange: #ff9d5c;
  --violet: #a78bfa;
  --shadow: 0 18px 50px rgba(16, 42, 67, .1);
  --radius: 24px;
  --radius-sm: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 5%, rgba(183, 243, 74, .14), transparent 24rem),
    radial-gradient(circle at 90% 24%, rgba(56, 189, 248, .10), transparent 26rem),
    var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 999; background: var(--lime); padding: .7rem 1rem; border-radius: 10px; }
.skip-link:focus { top: 1rem; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.section { padding: 92px 0; }
.section-tight { padding: 64px 0; }
.section-dark { color: white; background: var(--ink); position: relative; overflow: hidden; }
.section-dark::after { content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%; right: -180px; top: -180px; background: rgba(183, 243, 74, .09); }
.section-kicker { margin: 0 0 10px; color: #41755d; font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.section-dark .section-kicker { color: var(--lime); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 34px; }
.section-head h2, .page-hero h1 { margin: 0; max-width: 760px; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.12; letter-spacing: -.045em; }
.section-head p { max-width: 520px; margin: 0; color: var(--muted); }
.section-dark .section-head p { color: #bcccdc; }

.announcement { background: var(--ink); color: #d9e2ec; font-size: .83rem; }
.announcement .container { min-height: 34px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.announcement strong { color: var(--lime); }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(247, 248, 243, .92); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(219, 228, 232, .8); }
.nav-wrap { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: var(--ink); background: var(--lime); font-size: .88rem; font-weight: 900; letter-spacing: -.04em; box-shadow: inset 0 0 0 1px rgba(16,42,67,.12); }
.brand-copy { line-height: 1.1; }
.brand-copy small { display: block; color: var(--muted); font-size: .69rem; font-weight: 700; }
.brand-copy b { font-size: .98rem; letter-spacing: -.02em; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 10px 12px; border-radius: 10px; color: var(--ink-2); font-size: .9rem; font-weight: 650; transition: .2s ease; }
.nav-links a:hover, .nav-links a.active { background: white; color: var(--ink); box-shadow: 0 5px 18px rgba(16,42,67,.07); }
.nav-cta { padding: 10px 16px !important; background: var(--ink) !important; color: white !important; }
.nav-cta:hover { transform: translateY(-1px); }
.menu-btn { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: white; border-radius: 12px; color: var(--ink); }

.hero { min-height: 690px; padding: 92px 0 76px; display: flex; align-items: center; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(16,42,67,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(16,42,67,.035) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, black, transparent 82%); }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 68px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 7px 11px; background: rgba(255,255,255,.76); border: 1px solid var(--line); border-radius: 999px; color: #41755d; font-size: .75rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(85,214,190,.13); }
.hero h1 { margin: 24px 0 22px; max-width: 720px; font-size: clamp(3rem, 6.4vw, 5.7rem); line-height: .99; letter-spacing: -.065em; }
.hero h1 em { font-style: normal; color: #41755d; position: relative; white-space: nowrap; }
.hero p { max-width: 630px; margin: 0; color: var(--muted); font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 25px; }
.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 19px; border: 1px solid transparent; border-radius: 13px; font-weight: 800; transition: .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: white; background: var(--ink); box-shadow: 0 12px 28px rgba(16,42,67,.18); }
.btn-accent { color: var(--ink); background: var(--lime); box-shadow: 0 12px 24px rgba(183,243,74,.22); }
.btn-ghost { color: var(--ink); background: rgba(255,255,255,.78); border-color: var(--line); }
.btn-sm { min-height: 39px; padding: 0 13px; border-radius: 10px; font-size: .84rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--muted); font-size: .82rem; }
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta i { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); border: 2px solid var(--ink); }

.hero-board { position: relative; min-height: 480px; }
.board-shell { position: absolute; inset: 20px 0 0 16px; padding: 26px; color: white; background: var(--ink); border-radius: 32px; box-shadow: 0 34px 70px rgba(16,42,67,.25); transform: rotate(1.5deg); }
.board-shell::before { content: ""; position: absolute; inset: 0; border-radius: inherit; background: radial-gradient(circle at 80% 10%, rgba(85,214,190,.22), transparent 40%); }
.board-top { position: relative; display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,.12); }
.board-top b { font-size: .9rem; }
.board-dots { display: flex; gap: 6px; }
.board-dots i { width: 7px; height: 7px; border-radius: 50%; background: #829ab1; }
.board-dots i:first-child { background: var(--lime); }
.research-flow { position: relative; display: grid; gap: 12px; margin-top: 24px; }
.flow-step { display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; padding: 15px; border: 1px solid rgba(255,255,255,.1); border-radius: 16px; background: rgba(255,255,255,.055); }
.flow-num { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: var(--ink); background: var(--lime); font-size: .75rem; font-weight: 900; }
.flow-step:nth-child(2) .flow-num { background: var(--mint); }
.flow-step:nth-child(3) .flow-num { background: var(--cyan); }
.flow-step:nth-child(4) .flow-num { background: var(--orange); }
.flow-copy strong { display: block; font-size: .89rem; }
.flow-copy small { color: #9fb3c8; font-size: .74rem; }
.flow-status { color: #d9e2ec; font-size: .7rem; }
.board-note { position: absolute; right: -28px; bottom: 12px; width: 190px; padding: 17px; color: var(--ink); background: white; border-radius: 18px; box-shadow: var(--shadow); transform: rotate(-4deg); }
.board-note span { display: block; color: var(--muted); font-size: .72rem; }
.board-note strong { display: block; margin-top: 4px; line-height: 1.35; }

.entry-grid, .resource-grid, .direction-grid, .course-grid, .tool-grid { display: grid; gap: 18px; }
.entry-grid { grid-template-columns: repeat(3, 1fr); }
.entry-card { position: relative; min-height: 240px; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.82); transition: .25s ease; }
.entry-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.entry-index { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: var(--ink); background: var(--lime); font-size: .8rem; font-weight: 900; }
.entry-card:nth-child(2) .entry-index { background: var(--cyan); }
.entry-card:nth-child(3) .entry-index { background: var(--orange); }
.entry-card h3 { margin: 28px 0 9px; font-size: 1.35rem; letter-spacing: -.025em; }
.entry-card p { margin: 0 0 23px; color: var(--muted); font-size: .93rem; }
.text-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 850; font-size: .88rem; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }

.resource-grid { grid-template-columns: repeat(3, 1fr); }
.resource-card { display: flex; flex-direction: column; min-height: 305px; padding: 23px; border: 1px solid var(--line); border-radius: 20px; background: white; transition: .22s ease; }
.resource-card:hover { transform: translateY(-4px); border-color: rgba(65,117,93,.32); box-shadow: 0 18px 42px rgba(16,42,67,.09); }
.card-top { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.tag { display: inline-flex; align-items: center; min-height: 28px; padding: 0 10px; border-radius: 999px; background: #eef7e7; color: #315f4a; font-size: .7rem; font-weight: 850; }
.tag.blue { background: #e6f6fd; color: #11698e; }
.tag.orange { background: #fff0e6; color: #9a4818; }
.tag.violet { background: #f1edff; color: #5b45a4; }
.status { color: var(--muted); font-size: .7rem; font-weight: 700; }
.pending-status { display: inline-flex; align-items: center; padding: 5px 8px; border-radius: 999px; color: #7a3f1e; background: #fff0e6; font-weight: 850; }
.pending-card { background: linear-gradient(180deg, #fff 0%, #fffcf8 100%); }
.pending-card .card-action { color: #945028; }
.resource-card h3 { margin: 18px 0 10px; font-size: 1.14rem; line-height: 1.35; letter-spacing: -.025em; }
.resource-card p { margin: 0; color: var(--muted); font-size: .86rem; }
.card-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 17px; }
.card-meta span { padding: 5px 8px; border-radius: 8px; color: var(--ink-2); background: #f0f4f5; font-size: .68rem; font-weight: 700; }
.card-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: auto; padding-top: 22px; }
.difficulty { color: var(--muted); font-size: .72rem; }
.card-action { border: 0; background: transparent; color: var(--ink); font-weight: 850; font-size: .82rem; }

.direction-grid { grid-template-columns: repeat(3, 1fr); }
.direction-card { min-height: 265px; padding: 26px; color: white; border-radius: var(--radius); background: #173f5f; position: relative; overflow: hidden; }
.direction-card:nth-child(2), .direction-card:nth-child(6) { background: #315f4a; }
.direction-card:nth-child(3) { background: #493f77; }
.direction-card:nth-child(4) { background: #8b4c2b; }
.direction-card:nth-child(5) { background: #24556b; }
.direction-card::after { content: attr(data-code); position: absolute; right: -8px; bottom: -38px; color: rgba(255,255,255,.08); font-size: 6rem; font-weight: 950; letter-spacing: -.08em; }
.direction-card small { color: rgba(255,255,255,.7); font-size: .72rem; letter-spacing: .08em; }
.direction-card h3 { margin: 42px 0 10px; font-size: 1.45rem; }
.direction-card p { margin: 0 0 18px; color: rgba(255,255,255,.73); font-size: .86rem; }
.direction-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.direction-tags span { padding: 5px 8px; border: 1px solid rgba(255,255,255,.18); border-radius: 8px; color: rgba(255,255,255,.86); font-size: .66rem; }

.course-feature { display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; border-radius: 32px; background: white; box-shadow: var(--shadow); }
.teacher-panel { min-height: 440px; padding: 40px; color: white; background: var(--ink); position: relative; overflow: hidden; }
.teacher-panel::before { content: "ZH"; position: absolute; right: -12px; bottom: -50px; color: rgba(183,243,74,.08); font-size: 13rem; font-weight: 950; line-height: 1; }
.teacher-avatar { width: 88px; height: 88px; border-radius: 28px; object-fit: cover; background: var(--lime); border: 4px solid rgba(255,255,255,.12); }
.teacher-panel h3 { margin: 27px 0 10px; font-size: 1.8rem; }
.teacher-panel p { color: #bcccdc; font-size: .9rem; }
.teacher-proof { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.teacher-proof span { padding: 7px 10px; border-radius: 999px; background: rgba(255,255,255,.08); color: #d9e2ec; font-size: .7rem; }
.course-list { padding: 34px; }
.course-list-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 12px; }
.course-list-head h3 { margin: 0; font-size: 1.3rem; }
.mini-course { display: grid; grid-template-columns: 52px 1fr auto; align-items: center; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.mini-course:last-child { border-bottom: 0; }
.mini-course-index { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: #eef7e7; color: #315f4a; font-weight: 900; font-size: .73rem; }
.mini-course strong { display: block; font-size: .91rem; }
.mini-course small { color: var(--muted); font-size: .73rem; }
.mini-course a { font-size: .8rem; font-weight: 850; }

.page-hero { padding: 82px 0 58px; border-bottom: 1px solid var(--line); }
.page-hero-grid { display: grid; grid-template-columns: 1fr .72fr; gap: 50px; align-items: end; }
.page-hero p { max-width: 680px; margin: 20px 0 0; color: var(--muted); font-size: 1rem; }
.hero-stat-box { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.hero-stat { padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: white; }
.hero-stat strong { display: block; font-size: 1.25rem; }
.hero-stat small { color: var(--muted); font-size: .72rem; }

.filter-panel { padding: 20px; margin-bottom: 28px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.82); }
.search-row { display: grid; grid-template-columns: 1fr auto; gap: 12px; }
.search-box { position: relative; }
.search-box input { width: 100%; min-height: 52px; padding: 0 18px 0 44px; border: 1px solid var(--line); outline: 0; border-radius: 13px; color: var(--ink); background: white; }
.search-box input:focus { border-color: #6e9f87; box-shadow: 0 0 0 4px rgba(85,214,190,.12); }
.search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.filter-groups { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 15px; }
.filter-group { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
.filter-label { margin-right: 2px; color: var(--muted); font-size: .72rem; font-weight: 800; }
.filter-chip { min-height: 32px; padding: 0 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2); background: white; font-size: .72rem; font-weight: 750; }
.filter-chip.active { color: var(--ink); background: var(--lime); border-color: var(--lime); }
.results-line { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; color: var(--muted); font-size: .8rem; }
.empty-state { display: none; padding: 70px 20px; text-align: center; border: 1px dashed #9fb3c8; border-radius: 20px; color: var(--muted); }

.roadmap { position: relative; display: grid; gap: 18px; }
.roadmap::before { content: ""; position: absolute; left: 31px; top: 26px; bottom: 26px; width: 2px; background: linear-gradient(var(--lime), var(--cyan), var(--violet)); }
.roadmap-step { position: relative; display: grid; grid-template-columns: 64px 1fr .6fr; gap: 24px; align-items: start; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: white; }
.step-num { position: relative; z-index: 2; width: 64px; height: 64px; display: grid; place-items: center; border: 7px solid white; border-radius: 50%; color: var(--ink); background: var(--lime); font-weight: 950; }
.roadmap-step:nth-child(2) .step-num, .roadmap-step:nth-child(5) .step-num { background: var(--cyan); }
.roadmap-step:nth-child(3) .step-num, .roadmap-step:nth-child(6) .step-num { background: var(--orange); }
.roadmap-step:nth-child(4) .step-num { background: var(--violet); }
.step-main h3 { margin: 4px 0 8px; font-size: 1.25rem; }
.step-main p { margin: 0; color: var(--muted); font-size: .88rem; }
.step-output { padding: 15px; border-radius: 14px; background: #f0f4f5; }
.step-output small { display: block; color: var(--muted); font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.step-output strong { display: block; margin-top: 5px; font-size: .83rem; }
.step-resources { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 15px; }
.step-resources a { padding: 6px 9px; border-radius: 8px; background: #eef7e7; color: #315f4a; font-size: .7rem; font-weight: 800; }

.topic-block { margin-bottom: 54px; }
.topic-block:last-child { margin-bottom: 0; }
.topic-heading { display: grid; grid-template-columns: 220px 1fr; gap: 32px; margin-bottom: 20px; }
.topic-heading h2 { margin: 0; font-size: 1.9rem; letter-spacing: -.035em; }
.topic-heading p { margin: 0; color: var(--muted); }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.topic-card { padding: 21px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.topic-card small { color: #41755d; font-size: .68rem; font-weight: 900; letter-spacing: .08em; }
.topic-card h3 { margin: 13px 0 8px; font-size: 1.05rem; }
.topic-card p { margin: 0; color: var(--muted); font-size: .82rem; }

.course-grid { grid-template-columns: repeat(2, 1fr); }
.course-card { min-height: 330px; padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: white; display: flex; flex-direction: column; position: relative; overflow: hidden; }
.course-card::before { content: attr(data-code); position: absolute; right: -6px; top: -24px; color: #eff4f0; font-size: 5rem; font-weight: 950; letter-spacing: -.07em; }
.course-card > * { position: relative; }
.course-type { color: #41755d; font-size: .7rem; font-weight: 900; letter-spacing: .08em; }
.course-card h2 { margin: 32px 0 10px; max-width: 500px; font-size: 1.4rem; line-height: 1.3; }
.course-card p { margin: 0; color: var(--muted); font-size: .86rem; }
.course-links { display: flex; flex-wrap: wrap; gap: 9px; margin-top: auto; padding-top: 25px; }

.tool-grid { grid-template-columns: repeat(3, 1fr); }
.tool-card { padding: 25px; border: 1px solid var(--line); border-radius: 20px; background: white; }
.tool-card-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; color: var(--ink); background: var(--lime); font-weight: 950; }
.tool-card:nth-child(2n) .tool-card-icon { background: var(--cyan); }
.tool-card:nth-child(3n) .tool-card-icon { background: var(--orange); }
.tool-card h3 { margin: 22px 0 8px; }
.tool-card p { margin: 0; color: var(--muted); font-size: .84rem; }
.tool-card ul { margin: 17px 0 0; padding-left: 17px; color: var(--ink-2); font-size: .78rem; }

.diagnosis-layout { display: grid; grid-template-columns: 1fr .72fr; gap: 26px; align-items: start; }
.diagnosis-form, .diagnosis-aside { padding: 30px; border: 1px solid var(--line); border-radius: 24px; background: white; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { color: var(--ink-2); font-size: .78rem; font-weight: 800; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; outline: 0; background: #fbfcf9; color: var(--ink); }
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: #6e9f87; box-shadow: 0 0 0 4px rgba(85,214,190,.12); }
.form-note { margin: 16px 0; color: var(--muted); font-size: .73rem; }
.diagnosis-aside { position: sticky; top: 112px; color: white; background: var(--ink); border: 0; }
.diagnosis-aside h2 { margin-top: 0; }
.diagnosis-aside p, .diagnosis-aside li { color: #bcccdc; font-size: .84rem; }
.diagnosis-aside li { margin-bottom: 8px; }
.integrity-note { padding: 15px; margin-top: 24px; border-radius: 14px; color: #d9e2ec; background: rgba(255,255,255,.07); font-size: .75rem; }
.diagnosis-result { display: none; margin-top: 20px; padding: 19px; border-radius: 16px; background: #eef7e7; }
.diagnosis-result.visible { display: block; }
.diagnosis-result h3 { margin-top: 0; }
.diagnosis-result pre { white-space: pre-wrap; margin: 0; color: var(--ink-2); font: inherit; font-size: .8rem; }
.result-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 16px; }

.cta-panel { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; padding: 42px; border-radius: 28px; color: white; background: var(--ink); position: relative; overflow: hidden; }
.cta-panel::before { content: ""; position: absolute; width: 260px; height: 260px; right: -60px; bottom: -170px; border-radius: 50%; background: var(--lime); opacity: .15; }
.cta-panel h2 { position: relative; margin: 0 0 9px; font-size: clamp(1.7rem, 3vw, 2.4rem); line-height: 1.2; }
.cta-panel p { position: relative; max-width: 700px; margin: 0; color: #bcccdc; }
.cta-panel .btn { position: relative; }

.site-footer { padding: 54px 0 24px; color: #bcccdc; background: #0b2239; }
.footer-grid { display: grid; grid-template-columns: 1.25fr repeat(3, .7fr); gap: 38px; }
.footer-brand p { max-width: 390px; font-size: .8rem; }
.footer-col h3 { margin: 0 0 13px; color: white; font-size: .82rem; }
.footer-col a { display: block; margin: 8px 0; color: #bcccdc; font-size: .78rem; }
.footer-col a:hover { color: var(--lime); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 42px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.09); font-size: .7rem; }

.floating-contact { position: fixed; right: 22px; bottom: 22px; z-index: 45; display: flex; align-items: center; gap: 9px; min-height: 48px; padding: 0 16px; border: 0; border-radius: 999px; color: var(--ink); background: var(--lime); font-weight: 900; box-shadow: 0 16px 35px rgba(16,42,67,.22); }
.floating-contact i { width: 8px; height: 8px; border-radius: 50%; background: var(--ink); }

.modal-backdrop { position: fixed; inset: 0; z-index: 100; display: none; place-items: center; padding: 20px; background: rgba(8,27,43,.72); backdrop-filter: blur(8px); }
.modal-backdrop.open { display: grid; }
.modal { width: min(720px, 100%); max-height: min(85vh, 760px); overflow: auto; padding: 28px; border-radius: 24px; background: white; box-shadow: 0 40px 100px rgba(0,0,0,.3); position: relative; }
.modal-close { position: sticky; float: right; top: 0; width: 40px; height: 40px; border: 0; border-radius: 50%; background: #f0f4f5; color: var(--ink); font-weight: 900; }
.modal h2 { margin: 6px 50px 10px 0; line-height: 1.25; }
.modal p { color: var(--muted); }
.modal-detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 22px 0; }
.modal-detail { padding: 14px; border-radius: 13px; background: #f0f4f5; }
.modal-detail small { display: block; color: var(--muted); font-size: .68rem; }
.modal-detail strong { display: block; margin-top: 3px; font-size: .84rem; }
.wechat-modal { width: min(780px, 100%); }
.wechat-grid { display: grid; grid-template-columns: 260px 1fr; gap: 30px; align-items: center; }
.wechat-grid img { border-radius: 20px; border: 1px solid var(--line); }
.wechat-grid h2 { margin-top: 0; }
.wechat-grid ol { padding-left: 20px; color: var(--ink-2); font-size: .84rem; }
.placeholder-alert { padding: 11px 13px; border-radius: 11px; color: #7a3f1e; background: #fff0e6; font-size: .72rem; }
.toast { position: fixed; z-index: 200; left: 50%; bottom: 28px; padding: 11px 16px; border-radius: 11px; color: white; background: var(--ink); transform: translate(-50%, 80px); opacity: 0; transition: .25s ease; box-shadow: var(--shadow); font-size: .82rem; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

.keyword-box { margin: 15px 0; padding: 13px 15px; border: 1px dashed #8bb66e; border-radius: 12px; background: #f1f9e8; color: var(--ink-2); font-size: .82rem; }
.keyword-box strong { color: #315f4a; font-size: 1rem; }

.pending-document { display: grid; gap: 18px; padding: 30px; background: #f7faf8; }
.pending-resource-panel, .pending-resource-details { scroll-margin-top: 112px; padding: 32px; border: 1px solid var(--line); border-radius: 20px; background: white; }
.pending-eyebrow { margin: 0 0 8px; color: #945028; font-size: .7rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.pending-resource-panel h2, .pending-resource-details h2 { margin: 0 0 12px; font-size: clamp(1.45rem, 2.7vw, 2rem); letter-spacing: -.03em; }
.pending-resource-panel > p:not(.pending-eyebrow) { margin: 0; color: var(--muted); font-size: .94rem; }
.pending-notice { margin-top: 22px; padding: 17px 19px; border-left: 4px solid var(--orange); border-radius: 0 14px 14px 0; color: var(--ink-2); background: #fff6ef; font-size: .88rem; line-height: 1.75; }
.pending-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.pending-resource-details dl { display: grid; gap: 1px; margin: 20px 0 0; overflow: hidden; border: 1px solid var(--line); border-radius: 15px; background: var(--line); }
.pending-resource-details dl div { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 17px 19px; background: white; }
.pending-resource-details dt { color: var(--muted); font-size: .74rem; font-weight: 850; }
.pending-resource-details dd { margin: 0; color: var(--ink-2); font-size: .84rem; line-height: 1.65; }

.module-hero { padding: 86px 0 66px; color: white; background: var(--ink); position: relative; overflow: hidden; }
.module-hero::after { content: "178"; position: absolute; right: -18px; bottom: -95px; color: rgba(183,243,74,.08); font-size: clamp(11rem, 24vw, 22rem); font-weight: 950; line-height: 1; letter-spacing: -.08em; }
.module-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.12fr .68fr; gap: 58px; align-items: center; }
.module-hero h1 { max-width: 800px; margin: 12px 0 20px; font-size: clamp(2.7rem, 5.5vw, 5rem); line-height: 1.02; letter-spacing: -.06em; }
.module-hero p { max-width: 720px; color: #bcccdc; }
.module-hero p a { color: var(--lime); text-decoration: underline; text-underline-offset: 3px; }
.module-scoreboard { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; padding: 1px; overflow: hidden; border-radius: 24px; background: rgba(255,255,255,.16); box-shadow: 0 28px 65px rgba(0,0,0,.22); }
.module-scoreboard div { padding: 24px 13px; text-align: center; background: rgba(255,255,255,.07); }
.module-scoreboard strong { display: block; color: var(--lime); font-size: 1.8rem; }
.module-scoreboard span { color: #d9e2ec; font-size: .7rem; }
.module-scoreboard p { grid-column: 1 / -1; margin: 0; padding: 13px; text-align: center; background: rgba(255,255,255,.04); font-size: .72rem; }
.module-filter-panel { position: sticky; top: 92px; z-index: 20; box-shadow: 0 14px 35px rgba(16,42,67,.08); }
.module-toolbar { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 18px; color: var(--muted); font-size: .78rem; }
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.module-card { min-width: 0; padding: 21px; border: 1px solid var(--line); border-radius: 19px; background: white; transition: .22s ease; }
.module-card:hover { transform: translateY(-3px); border-color: rgba(65,117,93,.34); box-shadow: 0 16px 36px rgba(16,42,67,.08); }
.module-card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.module-venue { color: var(--muted); font-size: .66rem; font-weight: 750; text-align: right; }
.module-card h2 { margin: 18px 0 9px; font-size: 1.08rem; line-height: 1.25; word-break: break-word; }
.module-card code { display: block; min-height: 38px; overflow-wrap: anywhere; color: var(--muted); font-size: .68rem; line-height: 1.45; }
.module-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }

.resource-breadcrumb { display: flex; gap: 9px; align-items: center; padding-top: 32px; color: var(--muted); font-size: .78rem; }
.resource-breadcrumb a:hover { color: var(--ink); }
.resource-detail-hero { padding: 54px 0 64px; border-bottom: 1px solid var(--line); }
.resource-detail-hero-grid { display: grid; grid-template-columns: 1fr .58fr; gap: 60px; align-items: end; }
.resource-labels { display: flex; align-items: center; gap: 12px; }
.resource-detail-hero h1 { max-width: 820px; margin: 20px 0 16px; font-size: clamp(2.5rem, 5vw, 4.7rem); line-height: 1.05; letter-spacing: -.055em; }
.resource-detail-hero p { max-width: 760px; margin: 0; color: var(--muted); font-size: 1.02rem; }
.resource-facts { display: grid; gap: 1px; overflow: hidden; padding: 1px; border-radius: 20px; background: var(--line); }
.resource-facts div { padding: 17px 19px; background: white; }
.resource-facts small { display: block; color: var(--muted); font-size: .68rem; }
.resource-facts strong { display: block; margin-top: 4px; font-size: .86rem; }
.resource-detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 350px; gap: 32px; align-items: start; }
.article-content { display: grid; gap: 15px; }
.article-intro, .article-section { border: 1px solid var(--line); border-radius: 22px; background: white; }
.article-intro { padding: 28px; }
.article-intro h2 { margin: 6px 0 10px; font-size: 1.5rem; }
.article-intro p { margin: 0; color: var(--muted); }
.article-section { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 27px; }
.article-index { width: 45px; height: 45px; display: grid; place-items: center; border-radius: 13px; color: var(--ink); background: var(--lime); font-size: .75rem; font-weight: 950; }
.article-section:nth-child(3n) .article-index { background: var(--cyan); }
.article-section:nth-child(4n) .article-index { background: var(--orange); }
.article-section h2 { margin: 4px 0 10px; font-size: 1.32rem; }
.article-section p, .article-section li { color: var(--ink-2); font-size: .88rem; }
.article-section p { margin: 0; }
.article-section ul { margin: 10px 0 0; padding-left: 20px; }
.article-section li { margin: 7px 0; }
.source-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.source-links a { padding: 7px 10px; border-radius: 9px; color: #315f4a; background: #eef7e7; font-size: .72rem; font-weight: 800; }
.unlock-card { position: sticky; top: 112px; padding: 28px; border-radius: 24px; color: white; background: var(--ink); box-shadow: 0 24px 58px rgba(16,42,67,.18); }
.unlock-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 24px; border-radius: 15px; color: var(--ink); background: var(--lime); font-weight: 950; }
.unlock-card h2 { margin: 5px 0 12px; font-size: 1.45rem; }
.unlock-card ul { margin: 0 0 22px; padding-left: 19px; color: #d9e2ec; font-size: .8rem; }
.unlock-card li { margin: 7px 0; }
.unlock-card .btn { width: 100%; }
.unlock-card small { display: block; margin-top: 14px; color: #9fb3c8; font-size: .68rem; line-height: 1.55; }
.content-note { padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #eef7e7; }
.content-note strong { font-size: 1rem; }
.content-note p { margin: 7px 0 0; color: var(--ink-2); font-size: .86rem; }

/* Documentation / tutorial pages */
.docs-body { background: #f8faf7; }
.docs-body .floating-contact { display: none; }
.docs-shell { width: min(1420px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 260px minmax(0, 930px); justify-content: center; gap: 44px; padding: 34px 0 82px; }
.docs-sidebar { position: sticky; top: 112px; align-self: start; max-height: calc(100vh - 136px); overflow: auto; padding: 18px 16px 22px; border-right: 1px solid var(--line); scrollbar-width: thin; }
.docs-back { display: block; margin-bottom: 24px; color: #315f4a; font-size: .78rem; font-weight: 850; }
.docs-sidebar-title { margin: 18px 0 8px; color: var(--muted); font-size: .66rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.docs-sidebar nav, .docs-category-nav div { display: grid; gap: 2px; }
.docs-sidebar nav a, .docs-category-nav a { padding: 8px 10px; border-radius: 9px; color: var(--ink-2); font-size: .76rem; line-height: 1.4; }
.docs-sidebar nav a.toc-level-3, .docs-sidebar nav a.toc-level-4 { padding-left: 22px; color: var(--muted); font-size: .71rem; }
.docs-sidebar nav a:hover, .docs-category-nav a:hover { color: var(--ink); background: #eef7e7; }
.docs-category-nav { margin-top: 26px; padding-top: 4px; border-top: 1px solid var(--line); }
.docs-article { min-width: 0; }
.docs-breadcrumb { display: flex; align-items: center; gap: 8px; margin: 8px 0 26px; color: var(--muted); font-size: .75rem; }
.docs-breadcrumb a:hover { color: var(--ink); }
.docs-title-block { scroll-margin-top: 120px; padding: 42px; border: 1px solid var(--line); border-radius: 28px; background: white; box-shadow: 0 18px 42px rgba(16,42,67,.05); }
.docs-title-block h1 { margin: 18px 0 14px; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.12; letter-spacing: -.04em; }
.docs-title-block > p { max-width: 760px; margin: 0; color: var(--muted); font-size: 1rem; }
.article-document { margin-top: 18px; padding: 52px 64px 72px; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 18px 42px rgba(16,42,67,.04); }
.article-heading { scroll-margin-top: 116px; color: #172b3a; }
.article-h1, .article-h2 { margin: 48px 0 18px; padding-top: 24px; border-top: 1px solid #e8ecef; font-size: clamp(1.45rem, 2.4vw, 2rem); line-height: 1.35; letter-spacing: -.025em; }
.article-document > .article-heading:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.article-h3 { margin: 30px 0 12px; font-size: 1.12rem; line-height: 1.5; }
.article-h4 { margin: 24px 0 10px; font-size: 1rem; }
.article-text-block { scroll-margin-top: 116px; }
.article-paragraph { margin: 10px 0; color: #243b53; font-size: .95rem; line-height: 1.9; white-space: pre-wrap; overflow-wrap: anywhere; }
.article-list-block { scroll-margin-top: 116px; margin: 7px 0; padding: 0; color: #243b53; font-size: .95rem; line-height: 1.85; white-space: normal; }
.article-inline-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 14px; }
.article-inline-links a { max-width: 100%; padding: 7px 10px; border-radius: 8px; color: #245d48; background: #edf7f0; font-size: .76rem; overflow-wrap: anywhere; }
.article-figure { margin: 24px 0; }
.article-figure img { display: block; max-width: 100%; height: auto; margin: 0 auto; border: 1px solid var(--line); border-radius: 12px; }
.article-table-wrap { overflow-x: auto; margin: 18px 0 28px; border: 1px solid var(--line); border-radius: 12px; }
.article-table-wrap table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.article-table-wrap th, .article-table-wrap td { min-width: 100px; padding: 12px 14px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-table-wrap th { background: #f2f5f3; font-weight: 850; }
.article-code { margin: 20px 0; overflow: hidden; border: 1px solid #213747; border-radius: 13px; background: #102a3b; }
.article-code pre { margin: 0; padding: 20px; overflow-x: auto; color: #e9f2f6; font-size: .82rem; line-height: 1.7; white-space: pre; }
.copy-article-code { min-height: 28px; padding: 0 11px; border: 1px solid rgba(255,255,255,.18); border-radius: 8px; color: white; background: rgba(255,255,255,.08); font-size: .7rem; font-weight: 850; cursor: pointer; }
.docs-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.docs-meta span { padding: 6px 9px; border-radius: 8px; color: var(--ink-2); background: #f0f4f5; font-size: .7rem; font-weight: 720; overflow-wrap: anywhere; }
.docs-section { scroll-margin-top: 112px; margin-top: 18px; padding: 38px 42px; border: 1px solid var(--line); border-radius: 24px; background: white; }
.docs-section-number { margin: 0 0 5px !important; color: #41755d !important; font-size: .7rem !important; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.docs-section h2 { margin: 0 0 16px; font-size: clamp(1.45rem, 2.7vw, 2rem); letter-spacing: -.03em; }
.docs-section > p, .docs-section li { color: var(--ink-2); font-size: .91rem; }
.docs-section > p { margin: 10px 0; }
.docs-section ul { padding-left: 20px; }
.docs-section li { margin: 9px 0; }
.docs-section code:not(.code-window code) { padding: 2px 6px; border-radius: 5px; background: #edf2f3; font-size: .82em; }
.docs-section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.docs-section-head h2 { margin-bottom: 0; }
.symbol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 20px 0; }
.symbol-grid > div { min-width: 0; padding: 14px; border-radius: 13px; background: #f0f4f5; }
.symbol-grid small { display: block; color: var(--muted); font-size: .64rem; }
.symbol-grid code, .symbol-grid span { display: block; margin-top: 4px; overflow-wrap: anywhere; font-size: .78rem; }
.callout { margin-top: 20px; padding: 18px 20px; border-left: 4px solid var(--lime); border-radius: 0 13px 13px 0; background: #f1f9e8; }
.callout p { margin: 4px 0 0; color: var(--ink-2); font-size: .82rem; }
.code-window { margin: 20px 0; overflow: hidden; border: 1px solid #1c344b; border-radius: 16px; background: #0b1f33; box-shadow: 0 16px 35px rgba(11,31,51,.15); }
.code-toolbar { min-height: 43px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 15px; color: #b8c8d8; background: #102a43; border-bottom: 1px solid rgba(255,255,255,.09); font: 700 .7rem/1.2 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.code-window pre { max-height: 720px; margin: 0; overflow: auto; padding: 21px; color: #d9f0e5; font: 500 .78rem/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; tab-size: 4; }
.code-window code { white-space: pre; }
.copy-code, .copy-inline-code { min-height: 34px; padding: 0 11px; border: 1px solid var(--line); border-radius: 9px; color: var(--ink); background: white; font-size: .7rem; font-weight: 850; }
.copy-inline-code { min-height: 28px; border-color: rgba(255,255,255,.18); color: white; background: rgba(255,255,255,.08); }
.code-source-note { color: var(--muted) !important; font-size: .72rem !important; }
.docs-checklist { display: grid; gap: 10px; }
.docs-checklist > div { display: grid; grid-template-columns: 38px 1fr; gap: 13px; align-items: start; padding: 15px; border-radius: 14px; background: #f0f4f5; }
.docs-checklist span { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 10px; color: var(--ink); background: var(--lime); font-size: .72rem; font-weight: 900; }
.docs-checklist p { margin: 4px 0 0; color: var(--ink-2); font-size: .84rem; }
.experiment-steps, .tutorial-steps { counter-reset: tutorial; list-style: none; padding: 0 !important; }
.experiment-steps li, .tutorial-steps li { position: relative; padding: 15px 16px 15px 52px; border-bottom: 1px solid var(--line); }
.experiment-steps li::before, .tutorial-steps li::before { counter-increment: tutorial; content: counter(tutorial); position: absolute; left: 8px; top: 13px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; color: var(--ink); background: var(--lime); font-size: .68rem; font-weight: 900; }
.docs-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
.docs-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.docs-pager a { min-height: 92px; display: flex; flex-direction: column; justify-content: center; padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.docs-pager a:last-child { align-items: flex-end; text-align: right; }
.docs-pager small { color: var(--muted); font-size: .66rem; }
.docs-pager strong { margin-top: 4px; font-size: .82rem; }
.qa-list { display: grid; gap: 9px; margin-top: 20px; }
.qa-list details { padding: 15px 17px; border: 1px solid var(--line); border-radius: 13px; background: #fbfcf9; }
.qa-list summary { cursor: pointer; font-size: .86rem; font-weight: 800; }
.qa-list p { margin: 10px 0 0; color: var(--muted); font-size: .82rem; }

/* Action-oriented landing sections */
.surface-section { background: rgba(231, 238, 235, .48); border-top: 1px solid rgba(219, 228, 232, .8); border-bottom: 1px solid rgba(219, 228, 232, .8); }
.entry-grid-four { grid-template-columns: repeat(4, 1fr); }
.entry-grid-four .entry-card { min-height: 260px; padding: 24px; }
.entry-grid-four .entry-card:nth-child(4) .entry-index { background: var(--violet); }

.stage-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stage-picker a { display: grid; gap: 5px; min-height: 108px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: white; transition: .2s ease; }
.stage-picker a:hover { transform: translateY(-3px); border-color: #8bb69f; box-shadow: 0 14px 30px rgba(16,42,67,.07); }
.stage-picker strong { font-size: 1rem; }
.stage-picker span { color: var(--muted); font-size: .78rem; }
.roadmap-step { scroll-margin-top: 116px; }
.step-tasks { margin: 13px 0 0; padding-left: 18px; color: var(--ink-2); font-size: .78rem; }
.step-tasks li { margin: 5px 0; }
.milestone-grid, .question-grid, .diagnosis-flow, .course-path-grid, .module-guide-grid { display: grid; gap: 14px; }
.milestone-grid, .question-grid, .diagnosis-flow, .module-guide-grid { grid-template-columns: repeat(4, 1fr); }
.milestone-grid article, .question-grid article, .diagnosis-flow article, .module-guide-grid article { padding: 23px; border: 1px solid var(--line); border-radius: 18px; background: white; }
.milestone-grid span, .question-grid span, .diagnosis-flow span, .module-guide-grid span { display: inline-flex; padding: 5px 8px; border-radius: 8px; color: #315f4a; background: #eef7e7; font-size: .68rem; font-weight: 900; }
.milestone-grid h3, .question-grid h3, .diagnosis-flow h3, .module-guide-grid h3 { margin: 18px 0 7px; font-size: 1rem; }
.milestone-grid p, .question-grid p, .diagnosis-flow p, .module-guide-grid p { margin: 0; color: var(--muted); font-size: .8rem; }
.qa-list.two-column { grid-template-columns: repeat(2, 1fr); }

.question-grid { margin-bottom: 4px; }
.topic-card { display: flex; flex-direction: column; min-height: 330px; }
.topic-card dl { display: grid; gap: 8px; margin: 14px 0 20px; }
.topic-card dl div { display: grid; grid-template-columns: 58px 1fr; gap: 8px; }
.topic-card dt { color: var(--muted); font-size: .7rem; font-weight: 850; }
.topic-card dd { margin: 0; color: var(--ink-2); font-size: .75rem; }
.topic-card .text-link { margin-top: auto; font-size: .78rem; }

.workflow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.workflow-grid article { min-height: 300px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: white; }
.workflow-grid span { color: #41755d; font-size: .7rem; font-weight: 900; letter-spacing: .06em; }
.workflow-grid h3 { margin: 22px 0 13px; }
.workflow-grid p { margin: 7px 0; color: var(--ink-2); font-size: .79rem; }
.workflow-grid small { display: block; margin-top: 18px; padding: 11px 12px; border-radius: 10px; color: #315f4a; background: #eef7e7; font-size: .7rem; }
.template-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.template-card { scroll-margin-top: 112px; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: white; }
.template-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 20px 22px; border-bottom: 1px solid var(--line); }
.template-head span { color: #41755d; font-size: .68rem; font-weight: 900; }
.template-head h3 { margin: 2px 0 0; font-size: 1rem; }
.template-card pre { min-height: 280px; margin: 0; padding: 22px; overflow: auto; color: #d9f0e5; background: #102a3b; font: 500 .78rem/1.75 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre-wrap; }

.course-path-grid { grid-template-columns: repeat(2, 1fr); }
.course-path-grid a { min-height: 188px; padding: 25px; border: 1px solid var(--line); border-radius: 20px; background: white; transition: .2s ease; }
.course-path-grid a:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(16,42,67,.08); }
.course-path-grid span { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 11px; color: var(--ink); background: var(--lime); font-size: .75rem; font-weight: 950; }
.course-path-grid a:nth-child(2) span { background: var(--cyan); }
.course-path-grid a:nth-child(3) span { background: var(--orange); }
.course-path-grid a:nth-child(4) span { background: var(--violet); }
.course-path-grid h3 { margin: 20px 0 7px; }
.course-path-grid p { margin: 0 0 8px; color: var(--ink-2); font-size: .83rem; }
.course-path-grid small { color: var(--muted); font-size: .72rem; }
.course-card { min-height: 395px; }
.course-outcomes { margin: 18px 0 0; padding-left: 18px; color: var(--ink-2); font-size: .76rem; }
.course-outcomes li { margin: 6px 0; }

.diagnosis-flow { grid-template-columns: repeat(3, 1fr); }
.diagnosis-flow article { min-height: 150px; }
.diagnosis-recommendation { display: grid; gap: 7px; margin-top: 16px; padding-top: 15px; border-top: 1px solid rgba(49,95,74,.18); }
.diagnosis-recommendation strong { font-size: .76rem; }
.diagnosis-recommendation a { width: fit-content; color: #315f4a; font-size: .78rem; font-weight: 850; }

.resource-route-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: -10px 0 24px; }
.resource-route-strip span { margin-right: 4px; color: var(--muted); font-size: .74rem; font-weight: 800; }
.resource-route-strip a { padding: 7px 10px; border: 1px solid var(--line); border-radius: 999px; background: white; color: var(--ink-2); font-size: .72rem; font-weight: 750; }
.resource-route-strip a:hover { border-color: #8bb69f; background: #eef7e7; }
.module-guide-grid { margin-bottom: 18px; }

@media (max-width: 980px) {
  .nav-links { display: none; position: absolute; top: 76px; left: 20px; right: 20px; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: white; box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .menu-btn { display: grid; place-items: center; }
  .hero { min-height: auto; padding-top: 68px; }
  .hero-grid, .page-hero-grid, .course-feature, .diagnosis-layout, .module-hero-grid, .resource-detail-hero-grid, .resource-detail-layout { grid-template-columns: 1fr; }
  .hero-board { min-height: 490px; max-width: 620px; width: 100%; margin: 0 auto; }
  .entry-grid, .direction-grid, .resource-grid, .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .course-feature { max-width: 760px; margin: 0 auto; }
  .diagnosis-aside { position: static; }
  .unlock-card { position: static; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .docs-shell { grid-template-columns: 220px minmax(0, 1fr); gap: 24px; }
  .docs-title-block, .docs-section { padding: 30px; }
  .entry-grid-four, .milestone-grid, .question-grid, .module-guide-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, var(--max)); }
  .section { padding: 68px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 12px; }
  .brand-copy small { display: none; }
  .hero h1 { font-size: clamp(2.7rem, 14vw, 4.4rem); }
  .hero-board { min-height: 430px; }
  .board-shell { inset: 10px 6px 0; padding: 18px; transform: none; }
  .flow-step { grid-template-columns: 38px 1fr; }
  .flow-status { display: none; }
  .board-note { right: 5px; bottom: -10px; }
  .entry-grid, .resource-grid, .direction-grid, .course-grid, .tool-grid, .topic-grid { grid-template-columns: 1fr; }
  .topic-heading { grid-template-columns: 1fr; gap: 8px; }
  .roadmap-step { grid-template-columns: 50px 1fr; gap: 14px; padding: 20px; }
  .roadmap::before { left: 25px; }
  .step-num { width: 50px; height: 50px; border-width: 5px; }
  .step-output { grid-column: 2; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .cta-panel { grid-template-columns: 1fr; padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 7px; }
  .floating-contact span { display: none; }
  .floating-contact { width: 52px; padding: 0; justify-content: center; }
  .wechat-grid { grid-template-columns: 1fr; }
  .wechat-grid img { max-width: 230px; margin: 0 auto; }
  .modal-detail-grid { grid-template-columns: 1fr; }
  .hero-stat-box { margin-top: 20px; }
  .module-grid { grid-template-columns: 1fr; }
  .module-filter-panel { position: static; }
  .module-toolbar { display: block; }
  .module-toolbar span { display: block; margin-top: 5px; }
  .module-scoreboard div { padding: 18px 8px; }
  .resource-detail-hero { padding-top: 38px; }
  .article-section { grid-template-columns: 42px 1fr; gap: 13px; padding: 21px 18px; }
  .article-index { width: 38px; height: 38px; }
  .docs-shell { width: min(100% - 24px, 1420px); grid-template-columns: 1fr; gap: 14px; padding-top: 16px; }
  .docs-sidebar { position: static; max-height: none; overflow: visible; padding: 12px 0 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .docs-sidebar nav { display: flex; overflow-x: auto; padding-bottom: 6px; }
  .docs-sidebar nav a { flex: 0 0 auto; white-space: nowrap; background: white; border: 1px solid var(--line); }
  .docs-category-nav { display: none; }
  .docs-back { margin-bottom: 12px; }
  .docs-title-block, .docs-section { padding: 25px 20px; }
  .article-document { padding: 34px 20px 52px; }
  .pending-document { padding: 16px; }
  .pending-resource-panel, .pending-resource-details { padding: 24px 20px; }
  .pending-resource-details dl div { grid-template-columns: 1fr; gap: 5px; }
  .docs-title-block h1 { font-size: 2.55rem; }
  .symbol-grid { grid-template-columns: repeat(2, 1fr); }
  .docs-section-head { display: block; }
  .docs-section-head .copy-code { margin-top: 12px; }
  .code-window { margin-left: -8px; margin-right: -8px; border-radius: 12px; }
  .code-window pre { max-height: 580px; font-size: .72rem; }
  .docs-pager { grid-template-columns: 1fr; }
  .docs-pager a:last-child { align-items: flex-start; text-align: left; }
  .entry-grid-four, .stage-picker, .milestone-grid, .question-grid, .diagnosis-flow, .course-path-grid, .module-guide-grid, .workflow-grid, .template-grid, .qa-list.two-column { grid-template-columns: 1fr; }
  .topic-card { min-height: auto; }
  .template-card pre { min-height: 240px; }
}