:root {
  --ink: #20221e;
  --ink-soft: #625d53;
  --paper: #f3ecdc;
  --paper-deep: #e3d5bc;
  --card: #faf5e9;
  --red: #a33d30;
  --red-dark: #742b23;
  --jade: #40584d;
  --jade-dark: #293c35;
  --gold: #aa8853;
  --line: rgba(40, 35, 30, .17);
  --shadow: 0 22px 60px rgba(41, 31, 23, .17);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background-color: var(--paper); background-image: radial-gradient(circle at 16% 8%, rgba(255,255,255,.65), transparent 26%), radial-gradient(circle at 80% 42%, rgba(161,125,72,.08), transparent 34%), repeating-linear-gradient(92deg, rgba(48,43,34,.018) 0 1px, transparent 1px 7px); font-family: var(--sans); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .22em; }
button, input { font: inherit; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 99; padding: .7rem 1rem; background: #fff; }
.skip-link:focus { top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.site-header { position: sticky; top: 0; z-index: 20; min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 0 clamp(1rem, 4vw, 4rem); color: #f8f2e7; background: rgba(30, 34, 29, .96); border-bottom: 1px solid rgba(173,137,79,.32); box-shadow: 0 8px 30px rgba(14,17,14,.12); backdrop-filter: blur(14px); transition: min-height .2s ease, background .2s ease; }
.has-scrolled .site-header { min-height: 64px; background: rgba(27,31,27,.985); }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; }
.brand-mark { color: #dc8c77; font-size: 2.2rem; line-height: 1; text-shadow: 0 0 22px rgba(220,140,119,.25); }
.brand b { display: block; font-family: var(--serif); letter-spacing: .08em; }
.brand small { display: block; margin-top: .12rem; color: #c8bbaa; font-size: .66rem; letter-spacing: .15em; }
nav { display: flex; gap: clamp(1rem, 2.5vw, 2rem); }
nav a { color: #d9cfc1; font-size: .84rem; text-decoration: none; }
nav a:hover, nav a:focus-visible { color: white; }
nav a.nav-current { color: white; border-bottom: 1px solid #d98772; }
.reading-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; overflow: hidden; }
.reading-progress i { display: block; width: 100%; height: 100%; background: linear-gradient(90deg, var(--red), #d49366, var(--gold)); transform: scaleX(0); transform-origin: left; }

main { overflow: hidden; }
.hero { position: relative; min-height: 720px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); align-items: center; gap: clamp(2rem, 7vw, 8rem); padding: 7rem clamp(1.2rem, 8vw, 9rem); color: #f5efe4; background-color: #20251f; background-image: radial-gradient(ellipse at 82% 22%, rgba(83,108,91,.42), transparent 28%), radial-gradient(ellipse at 5% 100%, rgba(129,53,43,.2), transparent 35%), linear-gradient(125deg, #171a17 0%, #252a24 56%, #1d211d 100%); }
.hero::before { content: "易"; position: absolute; right: -3vw; bottom: -18vw; color: rgba(228,217,194,.035); font-family: var(--serif); font-size: min(58vw, 760px); line-height: .75; pointer-events: none; }
.hero::after { content: "经传分读"; position: absolute; left: clamp(.45rem, 2vw, 2rem); top: 7rem; color: rgba(224,206,176,.38); font: .68rem/1.45 var(--serif); letter-spacing: .55em; writing-mode: vertical-rl; }
.eyebrow, .section-no { margin: 0 0 1.3rem; color: var(--red); font-size: .75rem; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; }
.hero .eyebrow { color: #d98772; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; }
h1 { margin: 0; font-size: clamp(3.6rem, 8vw, 7.8rem); line-height: .98; letter-spacing: -.055em; }
h1 em { color: #d98772; font-style: normal; }
.lead { max-width: 760px; margin: 2.2rem 0 0; color: #d8cec1; font-family: var(--serif); font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.3rem; }
.button { display: inline-block; padding: .95rem 1.25rem; border: 1px solid rgba(255,255,255,.22); text-decoration: none; }
.button.primary { border-color: var(--red); background: var(--red); }
.button.primary:hover { background: var(--red-dark); }
.button.quiet:hover { border-color: rgba(255,255,255,.55); }
.button.ink { color: white; border-color: var(--ink); background: var(--ink); }
.button.ink:hover { background: #4a4037; }
.hero-object { position: relative; z-index: 1; max-width: 430px; justify-self: center; padding: 3rem; border: 1px solid rgba(188,167,128,.28); background: linear-gradient(145deg, rgba(82,103,87,.16), rgba(255,255,255,.018)); box-shadow: inset 0 0 0 8px rgba(255,255,255,.015), 0 28px 70px rgba(0,0,0,.16); }
.seal { position: absolute; right: -1.25rem; top: -1.25rem; display: grid; place-items: center; width: 64px; height: 64px; color: #f7d9cd; border: 2px solid #c95843; outline: 1px solid rgba(201,88,67,.55); outline-offset: -6px; font-family: var(--serif); font-size: 2rem; transform: rotate(5deg); }
.hexagram-lines { display: flex; flex-direction: column; gap: 17px; width: min(260px, 60vw); margin: 1rem auto 2.7rem; }
.hexagram-lines i { display: block; height: 13px; background: #f1e9dc; }
.hexagram-lines .yin { background: linear-gradient(to right, #f1e9dc 0 43%, transparent 43% 57%, #f1e9dc 57%); }
.hero-object p { margin: 0; color: #d7ccbe; line-height: 1.8; }
.hero-object b { display: inline-block; width: 2rem; color: white; font-family: var(--serif); }
.hero-object span { color: #a99d90; font-size: .84rem; }

.topic-band { display: grid; grid-template-columns: .75fr 1.25fr; gap: 2rem; padding: 2rem clamp(1.2rem, 8vw, 9rem); color: #efe6da; background: linear-gradient(90deg, #2d4138, #344a40); box-shadow: inset 0 1px rgba(255,255,255,.06), inset 0 -1px rgba(0,0,0,.18); }
.topic-band p { margin: .2rem 0; font: 1.05rem/1.7 var(--serif); }
.topic-band div { display: flex; flex-wrap: wrap; gap: .55rem; }
.topic-band span { position: relative; padding: .45rem .65rem; border: 1px solid rgba(226,210,181,.28); color: #e5dac6; font-size: .72rem; letter-spacing: .05em; }

.thesis, .library-section, .terms, .sources { padding: clamp(5rem, 9vw, 9rem) clamp(1.2rem, 8vw, 9rem); }
.thesis { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(3rem, 8vw, 9rem); border-top: 1px solid rgba(164,62,48,.14); background-color: var(--paper-deep); background-image: linear-gradient(90deg, transparent 49.9%, rgba(123,97,61,.06) 50%, transparent 50.1%); }
h2 { margin: 0; font-size: clamp(2.6rem, 5.5vw, 5.6rem); line-height: 1.05; letter-spacing: -.045em; }
.thesis > div:first-child > p:last-child, .section-heading > p { color: var(--ink-soft); line-height: 1.85; }
.layer-map { display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch; gap: 1.25rem; }
.layer-map article { position: relative; padding: 2rem; border-top: 3px solid var(--ink); background: rgba(255,252,244,.5); box-shadow: inset 0 0 0 1px rgba(92,75,50,.08); }
.layer-map article:last-child { border-top-color: #8c7f6f; }
.layer-map h3 { margin: 2.1rem 0 1rem; font-size: 1.7rem; }
.layer-map p { line-height: 1.75; }
.layer-map small { display: block; color: var(--ink-soft); line-height: 1.7; }
.tag { padding: .35rem .55rem; font-size: .68rem; font-weight: 700; letter-spacing: .12em; }
.tag.core { color: white; background: var(--red); }
.tag.later { color: white; background: #73695e; }
.not-equal { align-self: center; color: var(--red); font: 400 2rem var(--serif); }

.library-section { background: var(--paper); }
.section-heading { display: grid; grid-template-columns: 1.25fr .75fr; align-items: end; gap: 3rem; margin-bottom: 3rem; }
.section-heading > p { max-width: 530px; margin: 0; }
.toolbar { display: flex; align-items: stretch; justify-content: space-between; gap: 1rem; padding: .8rem; border: 1px solid rgba(85,73,53,.22); background: rgba(255,252,244,.58); box-shadow: 0 14px 35px rgba(56,43,27,.06); }
.search-box { flex: 1; display: flex; align-items: center; gap: .8rem; padding: .2rem .6rem; }
.search-box > span[aria-hidden] { font-size: 1.5rem; }
.search-box input { width: 100%; border: 0; outline: 0; color: var(--ink); background: transparent; }
kbd { padding: .22rem .42rem; color: #817669; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 3px; font-size: .68rem; }
.filters { display: flex; gap: .35rem; }
.filter { padding: .65rem .8rem; border: 0; color: var(--ink-soft); background: transparent; cursor: pointer; }
.filter span { margin-left: .25rem; color: #978a7b; font-size: .72rem; }
.filter.active { color: white; background: var(--ink); }
.domain-filters { display: flex; flex-wrap: wrap; align-items: center; gap: .45rem; padding: 1.15rem 0 .4rem; }
.domain-filters > span { margin-right: .45rem; color: var(--red); font: .76rem var(--serif); letter-spacing: .12em; }
.domain-filter { padding: .5rem .72rem; border: 1px solid rgba(64,88,77,.2); color: #635e54; background: transparent; cursor: pointer; transition: color .18s, background .18s, border-color .18s; }
.domain-filter:hover, .domain-filter:focus-visible { border-color: var(--jade); color: var(--jade-dark); }
.domain-filter.active { color: #f5ecdc; border-color: var(--jade); background: var(--jade); }
.library-status { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: .7rem 0 1.4rem; }
.result-note, .read-note { margin: 0; color: var(--ink-soft); font-size: .78rem; }
.read-note { color: var(--jade); font-family: var(--serif); letter-spacing: .08em; }
.gua-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border: 1px solid rgba(69,60,46,.18); background: rgba(69,60,46,.18); box-shadow: 0 22px 55px rgba(53,42,28,.07); }
.gua-card { position: relative; min-height: 252px; display: flex; flex-direction: column; align-items: flex-start; padding: 1.55rem; overflow: hidden; border: 0; color: var(--ink); background-color: rgba(250,246,236,.64); background-image: linear-gradient(112deg, rgba(255,255,255,.48), transparent 45%); text-align: left; cursor: pointer; transition: background .22s ease, transform .22s ease, box-shadow .22s ease; }
.gua-card::after { content: ""; position: absolute; right: -25px; bottom: -48px; width: 115px; height: 115px; border: 1px solid rgba(164,62,48,.06); border-radius: 50%; }
.gua-card:hover, .gua-card:focus-visible { z-index: 1; outline: 1px solid var(--red); outline-offset: -1px; background: #fffaf0; box-shadow: 0 18px 40px rgba(48,38,26,.15); transform: translateY(-4px); }
.gua-top { width: 100%; display: flex; align-items: flex-start; justify-content: space-between; }
.gua-symbol { color: var(--jade-dark); font-family: var(--serif); font-size: 3.25rem; line-height: 1; }
.gua-no { color: #8f8376; font: .74rem var(--sans); letter-spacing: .1em; }
.domain-stamp { margin-top: 1rem; color: #7a6a55; font-size: .64rem; letter-spacing: .12em; }
.gua-card h3 { margin: auto 0 .35rem; font-size: 1.75rem; }
.gua-card p { margin: 0; color: var(--ink-soft); font-size: .8rem; }
.gua-card .open { margin-top: 1.1rem; color: var(--red); font-size: .74rem; font-weight: 700; }
.read-mark { position: absolute; right: 1.15rem; bottom: 1rem; display: grid; place-items: center; width: 28px; height: 28px; color: transparent; border: 1px solid transparent; font: .72rem var(--serif); transform: rotate(-5deg); }
.gua-card.is-read .read-mark { color: rgba(163,61,48,.76); border-color: rgba(163,61,48,.48); }
.empty-state { padding: 5rem; border: 1px solid var(--line); text-align: center; }

.wings-teaser { position: relative; display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(3rem, 8vw, 8rem); padding: clamp(5rem, 9vw, 9rem) clamp(1.2rem, 8vw, 9rem); overflow: hidden; background: #d8c7ad; }
.wings-teaser-mark { position: absolute; right: -2rem; bottom: -7rem; color: rgba(117,72,48,.08); font: 20rem/.8 var(--serif); }
.wings-teaser > div:not(.wings-teaser-mark) { position: relative; z-index: 1; }
.wings-teaser-copy { align-self: end; }
.wings-teaser-copy p { color: #554a41; line-height: 1.9; }
.wings-teaser-copy .button { margin-top: 1rem; }

.method { padding: clamp(5rem, 9vw, 9rem) clamp(1.2rem, 8vw, 9rem); color: #f4eee3; background-color: var(--jade-dark); background-image: radial-gradient(circle at 10% 20%, rgba(255,255,255,.055), transparent 28%), repeating-linear-gradient(90deg, rgba(255,255,255,.015) 0 1px, transparent 1px 9px); }
.section-heading.inverse .section-no { color: #d98772; }
.section-heading.inverse > p { color: #c9bdaf; }
.method-list { border-top: 1px solid rgba(255,255,255,.16); }
.method-list article { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 1.5rem; padding: 2rem 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.method-list span { color: #d98772; font: 1.5rem var(--serif); }
.method-list h3 { margin: 0 0 .55rem; font-size: 1.45rem; }
.method-list p { max-width: 850px; margin: 0; color: #c9bdaf; line-height: 1.8; }

.terms { background: #eee5d5; background-image: radial-gradient(circle at 90% 12%, rgba(163,61,48,.07), transparent 26%); }
.term-table { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.term-table article { min-height: 180px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .18s ease; }
.term-table article:hover { background: rgba(255,252,244,.58); }
.term-table b { color: var(--red); font: 1.4rem var(--serif); }
.term-table p { color: var(--ink-soft); line-height: 1.7; }

.sources { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(3rem, 8vw, 8rem); background: var(--paper); }
.source-copy { display: grid; gap: 3rem; }
.certainty { display: grid; gap: 1.4rem; }
.certainty article { display: grid; grid-template-columns: 20px 1fr; gap: .9rem; }
.dot { width: 13px; height: 13px; margin-top: .35rem; border: 2px solid var(--red); border-radius: 50%; }
.dot.solid { background: var(--red); }
.dot.half { background: linear-gradient(90deg, var(--red) 50%, transparent 50%); }
.certainty b { font-family: var(--serif); font-size: 1.2rem; }
.certainty p { margin: .4rem 0 0; color: var(--ink-soft); line-height: 1.75; }
.bibliography { padding-top: 2rem; border-top: 1px solid var(--line); }
.bibliography h3 { font-size: 1.5rem; }
.bibliography ol { padding-left: 1.3rem; color: var(--ink-soft); }
.bibliography li { margin: .8rem 0; padding-left: .5rem; line-height: 1.65; }
.license-note { padding: 1.5rem; border: 1px solid var(--line); background: rgba(255,255,255,.32); }
.license-note p { margin-bottom: 0; color: var(--ink-soft); line-height: 1.7; }

footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1.4rem; padding: 3rem clamp(1.2rem, 8vw, 9rem); color: #d7cbbd; border-top: 1px solid rgba(176,145,93,.25); background: linear-gradient(110deg, #191d19, #26342d); }
.footer-mark { color: #d98772; font-size: 3.2rem; }
footer p { margin: 0; line-height: 1.7; }
.footer-meta { color: #9f9387; font-size: .76rem; text-align: right; }

dialog { width: min(980px, calc(100vw - 2rem)); max-height: calc(100vh - 2rem); padding: 0; border: 1px solid rgba(109,82,47,.2); color: var(--ink); background-color: var(--card); background-image: linear-gradient(90deg, transparent 49.85%, rgba(79,62,40,.08) 50%, transparent 50.15%); box-shadow: 0 35px 100px rgba(18,16,12,.36); }
dialog::backdrop { background: rgba(22,18,15,.75); backdrop-filter: blur(4px); }
.dialog-close { position: sticky; z-index: 2; float: right; top: 1rem; right: 1rem; width: 42px; height: 42px; margin: 1rem; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: var(--card); font-size: 1.5rem; cursor: pointer; }
.dialog-hero { display: grid; grid-template-columns: 150px 1fr; gap: 2rem; padding: 3.5rem; border-bottom: 1px solid rgba(76,63,45,.15); background: linear-gradient(110deg, #e5d5ba, #efe5d3); }
.dialog-symbol { color: var(--jade-dark); font-size: 7rem; line-height: 1; text-shadow: 0 12px 28px rgba(53,68,57,.12); }
.dialog-nav { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 1rem; padding: .9rem 3.5rem; border-bottom: 1px solid var(--line); background: rgba(255,252,244,.72); }
.dialog-nav button { padding: .45rem 0; border: 0; color: var(--jade-dark); background: transparent; cursor: pointer; text-align: left; }
.dialog-nav button:last-child { text-align: right; }
.dialog-nav button span { display: block; margin-bottom: .15rem; color: #8a7c6b; font-size: .62rem; letter-spacing: .12em; }
.dialog-nav b { color: #8a7c6b; font: .68rem var(--sans); letter-spacing: .12em; }
.dialog-kicker { color: var(--red); font-size: .75rem; font-weight: 700; letter-spacing: .16em; }
.dialog-hero h2 { margin: .4rem 0 .6rem; font-size: 3.6rem; }
.dialog-hero p { margin: 0; color: var(--ink-soft); }
.dialog-body { padding: 3rem 3.5rem 4rem; }
.dialog-section + .dialog-section { margin-top: 2.7rem; padding-top: 2.7rem; border-top: 1px solid var(--line); }
.dialog-section h3 { margin: 0 0 1.2rem; font-size: 1.45rem; }
.original-lines { margin: 0; padding: 0; list-style: none; counter-reset: lines; }
.original-lines li { display: grid; grid-template-columns: 32px 1fr; gap: .8rem; padding: .72rem 0; border-bottom: 1px dotted var(--line); font: 1.12rem/1.75 var(--serif); }
.original-lines li::before { counter-increment: lines; content: counter(lines, decimal-leading-zero); color: #a59686; font: .68rem/2.8 var(--sans); }
.context-box { padding: 1.5rem; border-left: 4px solid var(--red); background: var(--paper); }
.context-box p { margin: 0; line-height: 1.9; }
.question-box { margin-bottom: 1rem; padding: 1.6rem; color: #f6eee3; background: var(--ink); }
.question-box span, .scenario-label { display: block; margin-bottom: .55rem; color: #d98772; font-size: .7rem; font-weight: 700; letter-spacing: .14em; }
.question-box p { margin: 0; font: 1.35rem/1.7 var(--serif); }
.scenario-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-bottom: 1rem; background: var(--line); border: 1px solid var(--line); }
.scenario-grid article { padding: 1.5rem; background: var(--card); }
.scenario-grid p { margin: 0; line-height: 1.9; }
.context-box .scenario-label { margin-bottom: .7rem; }
.caution { margin-top: 1rem !important; color: var(--ink-soft); font-size: .82rem; }
.source-link { display: inline-block; margin-top: 1rem; color: var(--red); font-size: .82rem; }

/* 独立《易传》页面 */
.wings-page { background: #ebe0cf; }
.wings-hero { min-height: 680px; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: clamp(3rem, 8vw, 8rem); padding: 7rem clamp(1.2rem, 8vw, 9rem); color: #f5efe4; background: radial-gradient(circle at 80% 25%, #52473d 0, #28231e 48%); }
.wings-hero-quote { margin: 0; padding: 3rem 0 3rem 2.5rem; border-left: 2px solid #c95843; }
.wings-hero-quote span { color: #d98772; font-size: .72rem; font-weight: 700; letter-spacing: .16em; }
.wings-hero-quote p { margin: 1.1rem 0 0; font: clamp(1.7rem, 3vw, 3rem)/1.65 var(--serif); }
.turn-section, .confucius-section, .wings-list-section, .wing-conclusion, .wing-sources { padding: clamp(5rem, 9vw, 9rem) clamp(1.2rem, 8vw, 9rem); }
.turn-section { background: #e9dfd0; }
.turn-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 1rem; }
.turn-flow article { padding: 2rem; border-top: 3px solid var(--ink); background: rgba(255,255,255,.45); }
.turn-flow article:last-child { border-color: var(--red); }
.turn-flow span { color: var(--red); font-size: .7rem; font-weight: 700; letter-spacing: .14em; }
.turn-flow h3 { margin: 1.4rem 0 .6rem; font-size: 2.2rem; }
.turn-flow p { color: var(--ink); line-height: 1.7; }
.turn-flow small { color: var(--ink-soft); line-height: 1.7; }
.turn-arrow { align-self: center; color: var(--red); font-size: 2rem; }
.turn-note { margin: 2.5rem 0 0; padding: 1.4rem; border-left: 4px solid var(--red); color: var(--ink-soft); background: rgba(255,255,255,.3); line-height: 1.8; }

.confucius-section { position: relative; display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(3rem, 8vw, 8rem); overflow: hidden; background: #d5c3a9; }
.confucius-seal { position: absolute; left: -4rem; bottom: -9rem; color: rgba(124,56,39,.07); font: 26rem/.8 var(--serif); }
.confucius-section > div:not(.confucius-seal) { position: relative; z-index: 1; }
.confucius-lead { margin-top: 0; font: 1.22rem/1.95 var(--serif); }
.two-traditions { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 2rem; border: 1px solid var(--line); background: var(--line); }
.two-traditions article { padding: 1.6rem; background: rgba(247,241,230,.55); }
.two-traditions span { color: var(--red); font-size: .7rem; font-weight: 700; letter-spacing: .14em; }
.two-traditions h3 { margin: 1rem 0 .6rem; }
.two-traditions p { margin: 0; color: var(--ink-soft); line-height: 1.75; }
.confucius-copy > blockquote { margin: 2rem 0 0; padding: 1.5rem 0 0; border-top: 1px solid rgba(40,35,30,.25); font: 1.25rem/1.9 var(--serif); }

.wings-list-section { color: #f4eee3; background: #373029; }
.wing-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,.18); border-left: 1px solid rgba(255,255,255,.18); }
.wing-card { min-height: 480px; display: flex; flex-direction: column; padding: clamp(1.5rem, 3vw, 2.5rem); border-right: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.02); }
.wing-card.featured { background: #4b3b32; }
.wing-card-head { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: .9rem; }
.wing-card-head span { grid-row: 1 / 3; color: #d98772; font: 2rem var(--serif); }
.wing-card-head b { font: 1.45rem var(--serif); }
.wing-card-head small { color: #a99d90; }
.wing-card blockquote { margin: 2.5rem 0 1.7rem; padding-left: 1.2rem; border-left: 2px solid #c95843; color: #f0d7ca; font: 1.32rem/1.75 var(--serif); }
.wing-card h3 { margin: 0 0 .8rem; font-size: 1.35rem; }
.wing-card p { margin: 0 0 1.5rem; color: #cbbfb2; line-height: 1.85; }
.wing-card > a, .dual-links { margin-top: auto; }
.wing-card a { color: #e09a87; font-size: .8rem; }
.dual-links { display: flex; gap: 1rem; }

.wing-conclusion { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(3rem, 8vw, 8rem); background: #eee5d5; }
.wing-conclusion p { margin: 0 0 1rem; color: var(--ink-soft); font-size: 1.05rem; line-height: 1.85; }
.wing-conclusion b { color: var(--ink); font-family: var(--serif); }
.wing-conclusion .button { margin-top: 1.2rem; }

.wing-sources { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(3rem, 8vw, 8rem); background: var(--paper); }
.wing-sources ol { margin: 0; padding-left: 1.3rem; }
.wing-sources li { margin: 0 0 1.2rem; padding-left: .5rem; color: var(--ink-soft); line-height: 1.75; }
.wing-sources a { color: var(--red-dark); }

.back-to-top { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 18; width: 46px; height: 54px; padding: .2rem; border: 1px solid rgba(163,61,48,.6); color: var(--red); background: rgba(248,241,226,.92); box-shadow: 0 10px 30px rgba(42,32,21,.12); opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s, transform .2s; cursor: pointer; }
.back-to-top span { display: block; font: .8rem var(--serif); }
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.reveal-ready { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal-ready.reveal-in { opacity: 1; transform: none; }
.wing-card.reveal-ready:nth-child(even) { transition-delay: .07s; }

/* 十翼页延续青墨与朱砂的经卷系统 */
.wings-page { background-color: #ece2d1; background-image: repeating-linear-gradient(92deg, rgba(48,43,34,.018) 0 1px, transparent 1px 8px); }
.wings-hero { background-color: #20251f; background-image: radial-gradient(circle at 78% 28%, rgba(86,111,93,.42), transparent 28%), linear-gradient(130deg, #171a17, #283028 60%, #1d211d); }
.turn-section { background-color: #e9dfd0; background-image: radial-gradient(circle at 15% 10%, rgba(255,255,255,.5), transparent 24%); }
.turn-flow article { border-top-color: var(--jade); background: rgba(255,252,244,.5); box-shadow: 0 12px 30px rgba(60,45,27,.05); }
.confucius-section { background-color: #d5c3a9; background-image: radial-gradient(circle at 88% 18%, rgba(255,255,255,.3), transparent 30%); }
.wings-list-section { background-color: var(--jade-dark); background-image: radial-gradient(circle at 12% 8%, rgba(255,255,255,.05), transparent 20%), repeating-linear-gradient(90deg, rgba(255,255,255,.012) 0 1px, transparent 1px 9px); }
.wing-card.featured { background: rgba(123,63,48,.3); }
.wing-card blockquote { color: #efd9cb; }
.wing-conclusion { background: linear-gradient(110deg, #eee5d5, #e2d3bb); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal-ready { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .hero-object { justify-self: start; }
  .thesis, .sources { grid-template-columns: 1fr; }
  .gua-grid { grid-template-columns: repeat(3, 1fr); }
  .term-table { grid-template-columns: repeat(2, 1fr); }
  .topic-band { grid-template-columns: 1fr; }
  .wings-teaser { grid-template-columns: 1fr; }
  .wings-hero, .confucius-section, .wing-conclusion, .wing-sources { grid-template-columns: 1fr; }
  .turn-flow { grid-template-columns: 1fr; }
  .turn-arrow { justify-self: center; transform: rotate(90deg); }
}

@media (max-width: 700px) {
  .site-header { position: relative; padding-block: .9rem; }
  nav { display: none; }
  .hero { min-height: auto; padding-top: 5rem; }
  .hero::after { display: none; }
  .hero-object { width: 100%; padding: 2rem; }
  .section-heading { grid-template-columns: 1fr; gap: 1.2rem; }
  .layer-map { grid-template-columns: 1fr; }
  .not-equal { justify-self: center; transform: rotate(90deg); }
  .toolbar { flex-direction: column; }
  .filters { width: 100%; }
  .filter { flex: 1; }
  .gua-grid { grid-template-columns: repeat(2, 1fr); }
  .gua-card { min-height: 205px; }
  .domain-filters { flex-wrap: nowrap; margin-inline: -1.2rem; padding-inline: 1.2rem; overflow-x: auto; scrollbar-width: none; }
  .domain-filters::-webkit-scrollbar { display: none; }
  .domain-filters > span, .domain-filter { flex: 0 0 auto; }
  .library-status { align-items: flex-start; }
  .term-table { grid-template-columns: 1fr; }
  footer { grid-template-columns: auto 1fr; }
  .footer-meta { grid-column: 1 / -1; text-align: left; }
  .dialog-hero { grid-template-columns: 1fr; gap: .7rem; padding: 2.5rem 1.5rem; }
  .dialog-symbol { font-size: 5rem; }
  .dialog-body { padding: 2rem 1.5rem 3rem; }
  .dialog-nav { padding-inline: 1.5rem; }
  .scenario-grid { grid-template-columns: 1fr; }
  .wing-cards, .two-traditions { grid-template-columns: 1fr; }
  .wing-card { min-height: 430px; }
  .back-to-top { right: .8rem; bottom: .8rem; }
}

@media print {
  .site-header, .hero-actions, .toolbar, .dialog-close { display: none !important; }
  body { background: white; }
  .hero, .method, footer { color: black; background: white; }
  .hero { min-height: auto; padding-block: 2rem; }
  .hero-object { border-color: #999; }
  .hexagram-lines i { background: black; }
  .hexagram-lines .yin { background: linear-gradient(to right, #000 0 43%, transparent 43% 57%, #000 57%); }
  .gua-grid { grid-template-columns: repeat(4, 1fr); }
  .gua-card { min-height: 150px; break-inside: avoid; }
}