:root {
    --paper: #f3f0e9;
    --paper-deep: #e8e3da;
    --ink: #171717;
    --muted: #6f6a62;
    --line: #c9c2b7;
    --line-dark: #8f887f;
    --accent: #8d2f25;
    --accent-soft: #e6d4cf;
    --panel: #faf8f3;
    --dark: #1b1c1d;
    --dark-soft: #2b2c2e;
    --max: 1240px;
    --serif: "Iowan Old Style", "Noto Serif TC", "Source Han Serif TC", Georgia, serif;
    --sans: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
    --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .22;
    background-image: linear-gradient(rgba(25,25,25,.02) 1px, transparent 1px), linear-gradient(90deg, rgba(25,25,25,.018) 1px, transparent 1px);
    background-size: 28px 28px;
    z-index: 0;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }

.shell {
    width: min(calc(100% - 40px), var(--max));
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.dossier-progress {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    z-index: 200;
}
.dossier-progress span {
    display: block;
    width: 0;
    height: 100%;
    background: var(--accent);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(243,240,233,.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand {
    display: inline-flex;
    gap: 12px;
    align-items: center;
    text-decoration: none;
}
.brand img { border-radius: 50%; }
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy strong { font-size: 15px; letter-spacing: .02em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
.desktop-nav { display: flex; align-items: center; gap: 24px; }
.desktop-nav a, .desktop-nav button {
    font-size: 12px;
    letter-spacing: .04em;
    text-decoration: none;
}
.nav-item, .dossier-nav-link { position: relative; }
.nav-item::after, .dossier-nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -8px;
    height: 1px;
    width: 0;
    background: var(--ink);
    transition: width .25s ease;
}
.nav-item:hover::after, .dossier-nav-link:hover::after { width: 100%; }
.header-cta {
    border: 1px solid var(--ink);
    padding: 9px 13px;
    transition: background .2s ease, color .2s ease;
}
.header-cta:hover { background: var(--ink); color: var(--paper); }
.lang-switch-btn {
    border: 0;
    background: none;
    padding: 8px 0;
    cursor: pointer;
    color: var(--muted);
}
.menu-toggle { display: none; border: 0; background: none; width: 38px; height: 38px; padding: 8px; }
.menu-toggle span { display: block; height: 1px; background: var(--ink); margin: 7px 0; transition: transform .2s ease; }
.mobile-nav { border-top: 1px solid var(--line); padding: 18px 20px 22px; background: var(--paper); }
.mobile-nav a, .mobile-nav button { display: block; padding: 9px 0; text-decoration: none; }

.dossier-section { padding: 110px 0; border-bottom: 1px solid var(--line); }
.hero { padding-top: 34px; }
.file-meta {
    min-height: 54px;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 28px;
    align-items: center;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line);
    font: 10px/1.4 var(--mono);
    letter-spacing: .12em;
    color: var(--muted);
}
.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(300px, .8fr);
    gap: 70px;
    padding: 82px 0 64px;
    align-items: start;
}
.eyebrow {
    margin: 0 0 22px;
    font: 11px/1.3 var(--mono);
    color: var(--accent);
    letter-spacing: .12em;
    text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
.hero h1 {
    max-width: 900px;
    margin-bottom: 30px;
    font: 500 clamp(46px, 6vw, 84px)/.98 var(--serif);
    letter-spacing: -.045em;
}
.hero-lead {
    max-width: 760px;
    margin-bottom: 34px;
    font-size: clamp(16px, 1.55vw, 20px);
    color: #47443f;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    text-decoration: none;
    font-size: 13px;
    transition: transform .2s ease, background .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-dark { background: var(--dark); color: #fff; border: 1px solid var(--dark); }
.button-line { border: 1px solid var(--line-dark); }
.button-light { background: #fff; color: var(--ink); border: 1px solid rgba(255,255,255,.55); }

.hero-brief {
    background: var(--panel);
    border: 1px solid var(--ink);
    padding: 20px;
    box-shadow: 9px 9px 0 var(--paper-deep);
}
.brief-heading {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--ink);
    font: 10px/1.3 var(--mono);
    letter-spacing: .12em;
}
.brief-question { margin: 28px 0; font: 500 23px/1.38 var(--serif); }
.brief-rule { border-top: 1px solid var(--line); }
.brief-list { margin: 0; }
.brief-list div {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 14px;
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
}
.brief-list div:last-child { border-bottom: 0; }
.brief-list dt { font: 10px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.brief-list dd { margin: 0; color: var(--muted); font-size: 13px; }

.control-rail {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
}
.control-rail div { position: relative; padding: 22px 20px 24px; border-right: 1px solid var(--line); }
.control-rail div:last-child { border-right: 0; }
.control-rail span { position: absolute; right: 12px; top: 12px; font: 9px var(--mono); color: var(--muted); }
.control-rail strong { display: block; margin-bottom: 4px; font-size: 15px; }
.control-rail small { font: 9px var(--mono); letter-spacing: .12em; color: var(--muted); }

.section-intro { max-width: 820px; margin-bottom: 54px; }
.section-intro h2, .method-heading h2, .about h2, .contact h2 {
    margin-bottom: 20px;
    font: 500 clamp(34px, 4.4vw, 58px)/1.04 var(--serif);
    letter-spacing: -.035em;
}
.section-intro > p:last-child, .method-heading > p:last-child { color: var(--muted); font-size: 17px; max-width: 760px; }
.split-intro { max-width: none; display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: end; }
.split-intro > p { margin-bottom: 0; }

.capabilities { background: var(--panel); }
.capability-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.capability-card {
    position: relative;
    min-height: 320px;
    padding: 34px 34px 30px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255,255,255,.32);
    transition: background .25s ease, transform .25s ease;
}
.capability-card:hover { background: #fff; transform: translateY(-2px); }
.card-index { position: absolute; top: 18px; right: 20px; font: 10px var(--mono); color: var(--muted); }
.card-kicker { margin-bottom: 54px; font: 10px/1.3 var(--mono); letter-spacing: .1em; color: var(--accent); }
.capability-card h3 { margin-bottom: 18px; font: 500 31px/1.08 var(--serif); }
.capability-card > p:not(.card-kicker) { max-width: 540px; color: var(--muted); }
.card-question { display: block; max-width: 560px; margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 14px; line-height: 1.5; }

.signal-list { border-top: 1px solid var(--ink); }
.signal-row {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 28px;
    padding: 27px 0;
    border-bottom: 1px solid var(--line);
}
.signal-row > span { font: 10px var(--mono); color: var(--accent); }
.signal-row h3 { margin-bottom: 7px; font: 500 clamp(21px,2.4vw,30px)/1.2 var(--serif); }
.signal-row p { margin-bottom: 0; max-width: 850px; color: var(--muted); }

.evidence-chain { background: var(--dark); color: #f6f1e7; }
.evidence-chain .eyebrow { color: #d9978e; }
.evidence-chain .section-intro > p:last-child { color: #b9b3aa; }
.chain-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid #686662;
    border-left: 1px solid #4f4d49;
}
.chain-step {
    min-height: 270px;
    padding: 25px;
    position: relative;
    border-right: 1px solid #4f4d49;
    border-bottom: 1px solid #4f4d49;
}
.chain-step > span { position: absolute; top: 20px; right: 20px; font: 10px var(--mono); color: #8f8b84; }
.chain-step small { display: block; margin-bottom: 68px; font: 10px var(--mono); letter-spacing: .12em; color: #d9978e; }
.chain-step h3 { margin-bottom: 12px; font: 500 28px/1.1 var(--serif); }
.chain-step p { margin: 0; color: #b9b3aa; font-size: 14px; }

.method-heading { max-width: 900px; margin-bottom: 52px; }
.method-grid { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.method-card { min-height: 355px; padding: 26px 23px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.method-card > span { display: block; margin-bottom: 58px; font: 10px var(--mono); color: var(--accent); }
.method-card h3 { margin-bottom: 18px; font: 500 25px/1.1 var(--serif); }
.method-card strong { display: block; min-height: 64px; margin-bottom: 18px; font-size: 13px; line-height: 1.45; }
.method-card p { color: var(--muted); font-size: 14px; }
.method-card-proof { background: var(--paper-deep); }

.practice { background: var(--panel); }
.proof-note {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    gap: 18px;
    align-items: center;
    margin-bottom: 42px;
    padding: 16px 0;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line);
}
.proof-note span { font: 9px var(--mono); letter-spacing: .12em; color: var(--accent); }
.proof-note p { margin: 0; font-size: 13px; }
.article-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.article-card { min-height: 300px; background: var(--paper); padding: 26px; display: flex; flex-direction: column; }
.article-meta { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 54px; font: 9px var(--mono); letter-spacing: .08em; color: var(--muted); }
.article-card h3 { font: 500 25px/1.14 var(--serif); margin-bottom: 15px; }
.article-card p { color: var(--muted); font-size: 14px; }
.article-card a { margin-top: auto; font-size: 13px; text-decoration: none; border-top: 1px solid var(--line); padding-top: 16px; }
.text-link { display: inline-block; margin-top: 30px; text-decoration: none; font-size: 13px; }

.about-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.role { font: 11px var(--mono); letter-spacing: .08em; color: var(--accent); }
.role span { color: var(--line-dark); }
.about-copy > p { color: var(--muted); font-size: 17px; }
.about-copy blockquote { margin: 42px 0; padding: 24px 0 24px 26px; border-left: 2px solid var(--accent); font: 500 24px/1.45 var(--serif); }
.credential-row { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--ink); }
.credential-row div { padding: 20px 18px 12px 0; }
.credential-row strong { display: block; font: 500 28px var(--serif); }
.credential-row span { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; }

.contact { background: var(--accent); color: #fff; }
.contact-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact .eyebrow { color: #f3c8c1; }
.contact h2 { max-width: 780px; }
.contact p { color: #f0d9d5; max-width: 750px; }
.contact-email { color: #fff; text-underline-offset: 4px; }

/* V13 Dossier Form Styling */
.dossier-form { background: rgba(0,0,0,0.18); border: 1px solid rgba(255,255,255,0.2); border-radius: 8px; padding: 24px; }
.form-field label { display: block; font-size: 12px; font-family: var(--mono); color: #f3c8c1; margin-bottom: 6px; letter-spacing: 0.05em; }
.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"],
.form-field textarea {
    width: 100%;
    background: rgba(255,255,255,0.95);
    border: 1px solid rgba(0,0,0,0.15);
    border-radius: 4px;
    padding: 10px 12px;
    font-size: 14px;
    font-family: var(--sans);
    color: #1a1a1a;
    outline: none;
    box-sizing: border-box;
}
.form-field input:focus, .form-field textarea:focus { border-color: #fff; box-shadow: 0 0 0 2px rgba(255,255,255,0.3); }
.symptom-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #fce8e6;
    cursor: pointer;
}
.symptom-label input[type="checkbox"] {
    appearance: auto;
    -webkit-appearance: checkbox;
    width: 16px;
    height: 16px;
    margin: 0;
    cursor: pointer;
}

.site-footer { background: #121314; color: #eae7e0; padding: 38px 0; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: start; }
.footer-grid p { margin: 8px 0 0; color: #a9a59e; font-size: 13px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { text-decoration: none; font-size: 12px; color: #c7c3bd; }
.footer-grid > small { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid #323334; color: #77736d; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

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

@media (max-width: 1050px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: block; }
    .hero-grid, .about-grid, .contact-panel { grid-template-columns: 1fr; gap: 48px; }
    .hero-brief { max-width: 620px; }
    .method-grid { grid-template-columns: repeat(2,1fr); }
    .article-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
    .shell { width: min(calc(100% - 28px), var(--max)); }
    .dossier-section { padding: 76px 0; }
    .hero { padding-top: 22px; }
    .file-meta { grid-template-columns: 1fr auto; gap: 12px; min-height: 46px; }
    .file-meta span:nth-child(3) { display: none; }
    .hero-grid { padding: 54px 0 42px; }
    .hero h1 { font-size: clamp(42px, 13vw, 64px); }
    .control-rail { grid-template-columns: 1fr 1fr; }
    .control-rail div:nth-child(2) { border-right: 0; }
    .control-rail div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .split-intro { grid-template-columns: 1fr; gap: 18px; align-items: start; }
    .capability-grid, .method-grid, .chain-grid, .article-grid { grid-template-columns: 1fr; }
    .capability-card { min-height: 0; }
    .card-kicker { margin-bottom: 42px; }
    .chain-step { min-height: 230px; }
    .proof-note { grid-template-columns: auto 1fr; }
    .credential-row { grid-template-columns: 1fr; }
    .credential-row div { border-bottom: 1px solid var(--line); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-links { flex-wrap: wrap; }
}