/* ============================================================
   千智嘉育 · Editorial Modernism + Warm Earth Tones
   设计系统遵循 impeccable 反 AI-slop 原则
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    /* Forest（教育底蕴 · 主色） */
    --forest-900: #0F2A1F;
    --forest-800: #143326;
    --forest-700: #1B3A2F;
    --forest-600: #234939;
    --forest-500: #2D5443;
    --forest-400: #4A7060;
    --forest-300: #6B8A7A;

    /* Clay（活力暖色 · 强调） */
    --clay-700: #9A4423;
    --clay-600: #B5532A;
    --clay-500: #C9633A;
    --clay-400: #DC7E55;
    --clay-300: #E8A07A;
    --clay-200: #F0C5A8;
    --clay-100: #F7E3D2;

    /* Paper（纸张温度 · 背景） */
    --paper: #F4EDE0;
    --paper-soft: #EDE5D5;
    --paper-warm: #FBF6EC;
    --paper-card: #FEFAF1;

    /* Ink & Neutrals（暖色系，非纯黑） */
    --ink: #2A2520;
    --ink-soft: #3D362E;
    --muted: #6B6358;
    --soft: #9B9388;
    --line: #D9CFBE;
    --line-soft: #E8E0CF;

    /* Fonts */
    --f-display: "Fraunces", "Noto Serif SC", "Songti SC", serif;
    --f-body: "Manrope", "Noto Sans SC", "PingFang SC", sans-serif;
    --f-mono: "JetBrains Mono", "Fira Code", monospace;

    /* Layout */
    --container: 1440px;
    --pad: clamp(20px, 4vw, 40px);
    --section-py: clamp(96px, 12vw, 160px);

    /* Radius */
    --r-sm: 6px;
    --r: 12px;
    --r-lg: 20px;

    /* Shadow（轻微，不重） */
    --sh-sm: 0 2px 8px rgba(42, 37, 32, 0.05);
    --sh: 0 8px 28px rgba(42, 37, 32, 0.07);
    --sh-lg: 0 20px 50px rgba(42, 37, 32, 0.10);

    /* Easing */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-soft: cubic-bezier(0.32, 0.72, 0, 1);
    --t-fast: 0.25s var(--ease);
    --t: 0.45s var(--ease);
    --t-slow: 0.8s var(--ease);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--f-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--ink);
    background: var(--paper);
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
::selection { background: var(--clay-500); color: var(--paper-warm); }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--pad);
}

/* ---------- 通用类 ---------- */
.italic { font-style: italic; }
.clay { color: var(--clay-600); }
.bold { font-weight: 700; }

/* 滚动入场 */
[data-reveal], .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
    will-change: opacity, transform;
}
[data-reveal].is-visible, .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    [data-reveal], .reveal { opacity: 1; transform: none; }
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: var(--r-sm);
    font-family: var(--f-body);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.btn svg { transition: transform var(--t-fast); }

.btn--primary {
    background: var(--clay-600);
    color: var(--paper-warm);
    box-shadow: 0 4px 14px rgba(181, 83, 42, 0.25);
}
.btn--primary:hover {
    background: var(--clay-700);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(181, 83, 42, 0.35);
}
.btn--primary:hover svg { transform: translateX(3px); }

.btn--ghost {
    background: transparent;
    color: var(--forest-700);
    border: 1.5px solid var(--forest-700);
}
.btn--ghost:hover {
    background: var(--forest-700);
    color: var(--paper-warm);
    transform: translateY(-2px);
}

/* ---------- 导航 ---------- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 20px 0;
    transition: background var(--t-fast), padding var(--t-fast), border-color var(--t-fast);
    border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
    background: rgba(244, 237, 224, 0.92);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    padding: 14px 0;
    border-bottom-color: var(--line);
}
.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__logo {
    font-family: var(--f-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.01em;
}
.nav__logo-mark { display: inline-block; }
.nav__menu {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav__menu a:not(.nav__cta) {
    font-size: 14px;
    font-weight: 500;
    color: var(--ink-soft);
    padding: 6px 0;
    position: relative;
    transition: color var(--t-fast);
}
.nav__menu a:not(.nav__cta)::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 1.5px;
    background: var(--clay-500);
    transition: width var(--t-fast);
}
.nav__menu a:not(.nav__cta):hover { color: var(--clay-600); }
.nav__menu a:not(.nav__cta):hover::after { width: 100%; }

.nav__cta {
    background: var(--forest-700);
    color: var(--paper-warm) !important;
    padding: 10px 20px;
    border-radius: var(--r-sm);
    font-size: 14px;
    font-weight: 600;
    transition: background var(--t-fast), transform var(--t-fast);
}
.nav__cta:hover {
    background: var(--clay-600);
    transform: translateY(-2px);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 102;
}
.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }

.nav__overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 42, 31, 0.4);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t), visibility var(--t);
    z-index: 98;
}
.nav__overlay.is-open { opacity: 1; visibility: visible; }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    padding: 160px 0 100px;
    background: var(--paper);
    overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
/* 细微噪点纹理（纸张质感） */
.hero__noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.5'/></svg>");
    opacity: 0.04;
    mix-blend-mode: multiply;
}

.hero__inner {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--f-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--forest-600);
    text-transform: uppercase;
    margin-bottom: 32px;
}
.hero__eyebrow .dot {
    width: 6px; height: 6px;
    background: var(--clay-500);
    border-radius: 50%;
}

.hero__title {
    font-family: var(--f-display);
    font-size: clamp(2.8rem, 7vw, 5.2rem);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin-bottom: 36px;
    font-variation-settings: "opsz" 120;
}

.hero__subtitle {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    color: var(--muted);
    font-weight: 400;
    line-height: 1.6;
    max-width: 540px;
    margin-bottom: 44px;
}

.hero__quote {
    position: relative;
    padding: 20px 0 20px 28px;
    border-left: 3px solid var(--clay-500);
    margin-bottom: 44px;
    max-width: 540px;
    font-family: var(--f-display);
    font-size: 1.25rem;
    font-weight: 500;
    font-style: italic;
    line-height: 1.5;
    color: var(--forest-700);
}
.hero__quote .quote-mark {
    font-family: var(--f-display);
    font-size: 3rem;
    font-style: italic;
    font-weight: 600;
    color: var(--clay-500);
    line-height: 0;
    vertical-align: -0.3em;
    margin-right: 6px;
}

.hero__cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.hero__trust {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--soft);
    letter-spacing: 0.02em;
    max-width: 540px;
}

/* Hero 数据徽标 */
.hero__stats {
    display: flex;
    gap: 48px;
    margin-top: 40px;
}
.hero__stat {
    display: flex;
    align-items: baseline;
    gap: 10px;
}
.hero__stat-num {
    font-family: var(--f-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--forest-500);
    line-height: 1;
}
.hero__stat-label {
    font-family: var(--f-mono);
    font-size: 11px;
    color: var(--soft);
    letter-spacing: 0.06em;
}

/* Hero 装饰：大号编号 */
.hero__corner {
    position: absolute;
    right: var(--pad);
    bottom: 60px;
    text-align: right;
    z-index: 1;
    opacity: 0.6;
}
.hero__corner-num {
    display: block;
    font-family: var(--f-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--forest-500);
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}
.hero__corner-label {
    display: block;
    font-family: var(--f-display);
    font-size: 14px;
    font-style: italic;
    color: var(--forest-400);
}

/* ---------- Section 通用 ---------- */
.section {
    padding: var(--section-py) 0;
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 80px;
}
.section-head--left {
    text-align: left;
    margin-left: 0;
}

.section-num {
    display: inline-block;
    font-family: var(--f-mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--clay-600);
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--f-display);
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 24px;
    font-variation-settings: "opsz" 96;
}

.section-lead {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--muted);
    font-weight: 400;
}

/* ---------- §02 价值观 ---------- */
.values {
    background: var(--paper-warm);
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-soft);
}

.values__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line-soft);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    overflow: hidden;
    margin-bottom: 80px;
}
.value-item {
    background: var(--paper-warm);
    padding: 48px 40px;
    transition: background var(--t);
}
.value-item:hover { background: var(--paper-card); }

.value-item__num {
    font-family: var(--f-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 24px;
}
.value-item__title {
    font-family: var(--f-display);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--forest-700);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.value-item__desc {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.7;
}

.values__vision {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.values__vision-line {
    flex: 1;
    height: 1px;
    background: var(--line);
    max-width: 80px;
}
.values__vision p {
    font-family: var(--f-display);
    font-size: 1.15rem;
    font-style: italic;
    font-weight: 500;
    color: var(--ink-soft);
    line-height: 1.6;
}

/* ---------- §03 产品矩阵 ---------- */
.products {
    background: var(--paper);
}

.products__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.prod-card {
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.prod-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--sh-lg);
    border-color: var(--forest-300);
}

/* 第一个产品（核心引擎）占两列 */
.prod-card--feature {
    grid-column: span 1;
}
.prod-card--feature .prod-card__visual {
    aspect-ratio: 4 / 3;
}

.prod-card__visual {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--paper-soft);
}
.prod-card__visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--ease);
}
.prod-card:hover .prod-card__visual img {
    transform: scale(1.05);
}
.prod-card__tag {
    position: absolute;
    top: 20px; left: 20px;
    z-index: 2;
    padding: 6px 14px;
    background: var(--paper-warm);
    color: var(--forest-700);
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    border-radius: 100px;
}

.prod-card__body {
    padding: 36px 32px 32px;
    display: flex;
    flex-direction: column;
}
.prod-card__num {
    font-family: var(--f-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--clay-600);
    letter-spacing: 0.15em;
    margin-bottom: 16px;
}
.prod-card__title {
    font-family: var(--f-display);
    font-size: 1.7rem;
    font-weight: 600;
    color: var(--forest-700);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.prod-card__desc {
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 24px;
    flex: 1;
}
.prod-card__features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}
.prod-card__features li {
    padding: 6px 12px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    color: var(--forest-600);
    transition: background var(--t-fast), color var(--t-fast);
}
.prod-card__features li:hover {
    background: var(--forest-700);
    color: var(--paper-warm);
}
.prod-card__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--clay-600);
    font-size: 14px;
    font-weight: 600;
    transition: color var(--t-fast), gap var(--t-fast);
    align-self: flex-start;
}
.prod-card__link:hover {
    color: var(--clay-700);
    gap: 10px;
}
.prod-card__link svg { transition: transform var(--t-fast); }

/* ---------- §04 品牌情感升华 ---------- */
.emotion {
    position: relative;
    padding: 180px 0;
    background: var(--forest-900);
    color: var(--paper-warm);
    overflow: hidden;
}
.emotion__bg { position: absolute; inset: 0; pointer-events: none; }

/* 暖色光晕（不是冷光） */
.emotion__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.25;
}
.emotion__orb--1 {
    width: 600px; height: 600px;
    top: -180px; right: -180px;
    background: radial-gradient(circle, var(--clay-500) 0%, transparent 70%);
}
.emotion__orb--2 {
    width: 500px; height: 500px;
    bottom: -150px; left: -150px;
    background: radial-gradient(circle, var(--forest-400) 0%, transparent 70%);
}
.emotion__noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.5'/></svg>");
    opacity: 0.08;
    mix-blend-mode: overlay;
}

.emotion__inner {
    position: relative;
    z-index: 2;
    max-width: 860px;
}
.emotion__num {
    display: block;
    font-family: var(--f-mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--clay-300);
    margin-bottom: 36px;
}
.emotion__title {
    font-family: var(--f-display);
    font-size: clamp(2.4rem, 5.5vw, 4rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 56px;
    font-variation-settings: "opsz" 120;
}
.emotion__title .italic { color: var(--clay-300); }

.emotion__body {
    font-family: var(--f-display);
    font-size: clamp(1.2rem, 1.8vw, 1.5rem);
    line-height: 1.7;
    color: rgba(251, 246, 236, 0.88);
    font-weight: 400;
    margin-bottom: 64px;
    max-width: 720px;
}
.emotion__body p { margin-bottom: 20px; }
.emotion__body .clay { color: var(--clay-300); font-weight: 500; }

.emotion__signoff {
    font-family: var(--f-display);
    font-size: 1.2rem;
    font-style: italic;
    font-weight: 500;
    color: var(--clay-300);
    padding-top: 32px;
    border-top: 1px solid rgba(232, 160, 122, 0.25);
    max-width: 720px;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--forest-800);
    color: rgba(251, 246, 236, 0.7);
    padding: 100px 0 0;
}
.footer__top {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 80px;
    padding-bottom: 80px;
}

.footer__logo {
    display: inline-block;
    font-family: var(--f-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--paper-warm);
    margin-bottom: 20px;
}
.footer__slogan {
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(251, 246, 236, 0.55);
    font-weight: 400;
}

.footer__cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}
.footer__col h4 {
    font-family: var(--f-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--clay-300);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.footer__col a {
    display: block;
    padding: 6px 0;
    color: rgba(251, 246, 236, 0.6);
    font-size: 0.95rem;
    transition: color var(--t-fast), transform var(--t-fast);
}
.footer__col a:hover {
    color: var(--clay-300);
    transform: translateX(3px);
}

.footer__bottom {
    border-top: 1px solid rgba(251, 246, 236, 0.1);
    padding: 28px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(251, 246, 236, 0.4);
}
.footer__bottom p:last-child {
    font-family: var(--f-display);
    font-style: italic;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .section { padding: 96px 0; }
    .prod-card--feature {
        grid-column: span 2;
        grid-template-columns: 1fr;
    }
    .prod-card--feature .prod-card__visual {
        min-height: 320px;
        aspect-ratio: 16/9;
    }
}

@media (max-width: 768px) {
    :root { --pad: 20px; }

    .nav__menu {
        position: fixed;
        top: 0; right: 0;
        width: 78%; max-width: 320px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: 28px;
        background: var(--forest-800);
        padding: 80px 36px;
        transform: translateX(100%);
        transition: transform var(--t);
        z-index: 100;
        box-shadow: -16px 0 40px rgba(0,0,0,0.3);
    }
    .nav__menu.is-open { transform: translateX(0); }
    .nav__menu a:not(.nav__cta) {
        color: rgba(251, 246, 236, 0.85);
        font-size: 1.05rem;
    }
    .nav__toggle { display: flex; }

    .hero { padding: 130px 0 80px; }
    .hero__corner { display: none; }
    .hero__stats { gap: 28px; flex-wrap: wrap; }
    .hero__stat-num { font-size: 1.6rem; }

    .section-head { margin-bottom: 56px; }

    .values__list {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .value-item { padding: 36px 28px; }
    .values__vision {
        flex-direction: column;
        gap: 16px;
    }
    .values__vision-line { width: 100%; max-width: 100px; }

    .products__grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .prod-card--feature { grid-column: span 1; }
    .prod-card__body { padding: 28px 24px; }
    .prod-card__title { font-size: 1.5rem; }

    .emotion { padding: 110px 0; }
    .emotion__body { font-size: 1.15rem; }

    .footer__top {
        grid-template-columns: 1fr;
        gap: 48px;
        padding-bottom: 56px;
    }
    .footer__cols {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    .footer__bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title { font-size: 2.5rem; }
    .hero__cta .btn { flex: 1; justify-content: center; }
    .footer__cols { grid-template-columns: 1fr; }
}

/* ============================================================
   内页通用组件
   ============================================================ */

/* ---------- 页面 Hero（内页头部） ---------- */
.page-hero {
    padding: 150px 0 60px;
    background: var(--paper);
    border-bottom: 1px solid var(--line-soft);
    position: relative;
    overflow: hidden;
}
.page-hero__inner { max-width: 820px; }
.page-hero__bread {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--soft);
    letter-spacing: 0.05em;
    margin-bottom: 28px;
}
.page-hero__bread a:hover { color: var(--clay-600); }
.page-hero__bread span { margin: 0 8px; color: var(--line); }
.page-hero__num {
    display: block;
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--clay-600);
    letter-spacing: 0.15em;
    margin-bottom: 20px;
}
.page-hero__title {
    font-family: var(--f-display);
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 24px;
    font-variation-settings: "opsz" 96;
}
.page-hero__lead {
    font-size: 1.15rem;
    color: var(--muted);
    line-height: 1.7;
    max-width: 640px;
}

/* ---------- 长文正文块 ---------- */
.prose {
    max-width: 720px;
}
.prose p {
    font-size: 1.1rem;
    line-height: 1.85;
    color: var(--ink-soft);
    margin-bottom: 24px;
}
.prose p:last-child { margin-bottom: 0; }
.prose .lead {
    font-family: var(--f-display);
    font-size: 1.4rem;
    font-style: italic;
    color: var(--forest-700);
    line-height: 1.6;
    margin-bottom: 32px;
}

/* ---------- 详情页组件 ---------- */
.detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--line-soft);
}
.detail-meta__item {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--soft);
    letter-spacing: 0.02em;
}
.detail-body {
    max-width: 820px;
    margin: 0 auto;
}
.detail-cover {
    margin-bottom: 48px;
    border-radius: var(--r-lg);
    overflow: hidden;
    aspect-ratio: 16 / 9;
}
.detail-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.detail-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
    padding: 36px;
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
}
.detail-stat {
    text-align: center;
}
.detail-stat__num {
    display: block;
    font-family: var(--f-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 600;
    color: var(--clay-600);
    line-height: 1;
    margin-bottom: 8px;
    font-variation-settings: "opsz" 96;
}
.detail-stat__label {
    font-size: 14px;
    color: var(--soft);
    letter-spacing: 0.02em;
}

/* ---------- 正文排版增强 ---------- */
.prose__h2 {
    font-family: var(--f-display);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--ink);
    margin-top: 48px;
    margin-bottom: 20px;
    line-height: 1.3;
}
.prose__step {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    padding: 24px;
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-md);
}
.prose__step-num {
    font-family: var(--f-mono);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--clay-600);
    flex-shrink: 0;
    line-height: 1;
}
.prose__step-title {
    font-family: var(--f-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}
.prose__step p {
    font-size: 1rem;
    margin-bottom: 0;
}
.prose__list {
    list-style: none;
    padding: 0;
    margin-bottom: 28px;
}
.prose__list li {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--ink-soft);
    padding-left: 28px;
    position: relative;
    margin-bottom: 12px;
}
.prose__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--clay-500);
}
.prose__list li strong {
    color: var(--ink);
    font-weight: 600;
}
.prose__quote {
    margin: 36px 0;
    padding: 28px 32px;
    background: var(--paper-warm);
    border-left: 3px solid var(--clay-500);
    border-radius: 0 var(--r-md) var(--r-md) 0;
    font-family: var(--f-display);
    font-size: 1.2rem;
    font-style: italic;
    color: var(--forest-700);
    line-height: 1.7;
}
.prose__quote cite {
    display: block;
    margin-top: 12px;
    font-size: 0.95rem;
    font-style: normal;
    color: var(--soft);
}
.prose__end {
    text-align: center;
    font-family: var(--f-display);
    font-style: italic;
    color: var(--clay-600);
    margin-top: 48px !important;
    font-size: 1.2rem !important;
}

/* ---------- 详情页底部导航 ---------- */
.detail-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--line-soft);
}
.detail-nav__back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--muted);
    transition: color var(--t);
}
.detail-nav__back:hover { color: var(--clay-600); }
    font-style: italic;
    color: var(--forest-700);
    line-height: 1.6;
}

/* ---------- 创始团队卡片 ---------- */
.founders {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.founder-card {
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    padding: 36px 28px;
    transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.founder-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sh);
    border-color: var(--forest-300);
}
.founder-card__avatar {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--forest-500), var(--forest-700));
    display: flex; align-items: center; justify-content: center;
    font-family: var(--f-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--paper-warm);
    margin-bottom: 24px;
}
.founder-card__name {
    font-family: var(--f-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}
.founder-card__role {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--clay-600);
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    display: block;
}
.founder-card__bio {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--muted);
}

/* ---------- 理念列表 ---------- */
.belief-list { display: grid; gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); border-radius: var(--r-lg); overflow: hidden; }
.belief-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    background: var(--paper-warm);
    padding: 36px 32px;
    align-items: start;
}
.belief-item__label {
    font-family: var(--f-display);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--forest-700);
}
.belief-item__text {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.75;
}

/* ---------- 产品详情块 ---------- */
.prod-detail {
    padding: 80px 0;
    border-bottom: 1px solid var(--line-soft);
}
.prod-detail:nth-child(even) { background: var(--paper-warm); }
.prod-detail__inner {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: center;
}
.prod-detail--reverse .prod-detail__inner {
    grid-template-columns: 1.1fr 1fr;
}
.prod-detail--reverse .prod-detail__media { order: -1; }
.prod-detail__text {
    padding: 8px 0;
}
.prod-detail__kicker {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    display: block;
}
.prod-detail__title {
    font-family: var(--f-display);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 24px;
    letter-spacing: -0.015em;
}
.prod-detail__desc {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 28px;
}
.prod-detail__media {
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--paper-soft);
    aspect-ratio: 4 / 3;
}
.prod-detail__media img {
    width: 100%; height: 100%; object-fit: cover;
}

/* 轮播图 */
.carousel { position: relative; }
.carousel__track {
    display: flex;
    transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    height: 100%;
}
.carousel__track img {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
}
.carousel__dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 2;
}
.carousel__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
}
.carousel__dot.is-active {
    background: var(--clay-500);
    width: 24px;
    border-radius: 4px;
}

/* 功能列表 */
.feature-block { margin-bottom: 40px; }
.feature-block:last-child { margin-bottom: 0; }
.feature-block__head {
    display: flex; align-items: baseline; gap: 12px;
    margin-bottom: 12px;
}
.feature-block__num {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--clay-600);
    font-weight: 500;
}
.feature-block__title {
    font-family: var(--f-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--forest-700);
}
.feature-block__text {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.75;
    padding-left: 32px;
}

/* 价值点（对XX的价值） */
.value-props {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 32px 0;
}
.value-prop {
    padding: 20px;
    background: var(--paper);
    border: 1px solid var(--line-soft);
    border-radius: var(--r);
}
.value-prop__label {
    font-family: var(--f-mono);
    font-size: 11px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
    display: block;
}
.value-prop__text {
    font-size: 0.95rem;
    color: var(--ink-soft);
    line-height: 1.6;
}

/* ---------- 解决方案块 ---------- */
.sol-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    padding: 72px 0;
    border-bottom: 1px solid var(--line-soft);
    align-items: center;
}
.sol-block__intro { padding: 8px 0; }
.sol-block__tag {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 32px;
    display: block;
    grid-column: 1 / -1;
}
.sol-block__title {
    font-family: var(--f-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 24px;
    letter-spacing: -0.015em;
    line-height: 1.25;
}
.sol-block__lead {
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.8;
}
/* 左侧 intro 内的轮播图 */
.sol-visual {
    position: relative;
    margin-top: 32px;
    border-radius: var(--r);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--paper-soft);
    border: 1px solid var(--line-soft);
}
.sol-visual img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1.04);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.sol-visual img.is-active {
    opacity: 1;
    transform: scale(1);
}

.sol-points { display: grid; gap: 16px; }
.sol-point {
    padding: 24px 26px;
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-left: 3px solid transparent;
    border-radius: var(--r-lg);
    cursor: pointer;
    transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.sol-point:hover { border-color: var(--forest-300); transform: translateX(2px); }
.sol-point.is-active {
    border-color: var(--forest-300);
    border-left-color: var(--clay-500);
    background: var(--paper);
    box-shadow: 0 6px 20px rgba(45, 84, 67, 0.08);
}
.sol-point__title {
    font-family: var(--f-display);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--forest-700);
    margin-bottom: 10px;
}
.sol-point.is-active .sol-point__title { color: var(--clay-600); }
.sol-point__text {
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.case-card {
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sh);
    border-color: var(--forest-300);
}
.case-card__media {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--paper-soft);
}
.case-card__media img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.8s var(--ease);
}
.case-card:hover .case-card__media img { transform: scale(1.05); }
.case-card__body { padding: 32px 28px; }
.case-card__tag {
    font-family: var(--f-mono);
    font-size: 11px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: block;
}
.case-card__title {
    font-family: var(--f-display);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
    line-height: 1.3;
}
.case-card__desc {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

/* 数据指标条 */
.case-stats {
    display: flex; gap: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--line-soft);
}
.case-stat { display: flex; flex-direction: column; gap: 2px; }
.case-stat__num {
    font-family: var(--f-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--clay-600);
}
.case-stat__label {
    font-family: var(--f-mono);
    font-size: 11px;
    color: var(--soft);
    letter-spacing: 0.05em;
}

/* 用户证言 */
.testimonials { display: grid; gap: 32px; }
.testimonial {
    padding: 40px 36px;
    background: var(--paper-warm);
    border-left: 3px solid var(--clay-500);
    border-radius: 0 var(--r-lg) var(--r-lg) 0;
}
.testimonial__quote {
    font-family: var(--f-display);
    font-size: 1.25rem;
    font-style: italic;
    font-weight: 500;
    line-height: 1.6;
    color: var(--forest-700);
    margin-bottom: 20px;
}
.testimonial__author {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--soft);
    letter-spacing: 0.02em;
}

/* ---------- 资讯列表 ---------- */
.news-list { display: grid; gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); border-radius: var(--r-lg); overflow: hidden; }
.news-item {
    display: grid;
    grid-template-columns: 140px 1fr auto;
    gap: 32px;
    align-items: center;
    background: var(--paper-warm);
    padding: 32px 36px;
    transition: background var(--t);
    cursor: pointer;
}
.news-item:hover { background: var(--paper-card); }
.news-item__date {
    font-family: var(--f-mono);
    font-size: 13px;
    color: var(--soft);
}
.news-item__body { display: flex; flex-direction: column; gap: 8px; }
.news-item__tag {
    font-family: var(--f-mono);
    font-size: 11px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
}
.news-item__title {
    font-family: var(--f-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
}
.news-item__arrow {
    color: var(--clay-500);
    font-size: 1.2rem;
    transition: transform var(--t);
}
.news-item:hover .news-item__arrow { transform: translateX(6px); }

/* ---------- 联系表单 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 64px;
    align-items: start;
}
.contact-info { display: grid; gap: 28px; }
.contact-info__item {
    padding: 24px 0;
    border-bottom: 1px solid var(--line-soft);
}
.contact-info__item:last-child { border-bottom: none; }
.contact-info__label {
    font-family: var(--f-mono);
    font-size: 12px;
    color: var(--clay-600);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
    display: block;
}
.contact-info__value {
    font-family: var(--f-display);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--ink);
}

/* 微信二维码卡片 */
.contact-qr-card {
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    padding: 40px 36px 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.contact-qr-card .contact-info__label { margin-bottom: 24px; }
.contact-qr-card__img {
    width: 240px;
    height: 240px;
    background: repeating-linear-gradient(45deg, var(--paper-warm), var(--paper-warm) 12px, var(--paper-soft) 12px, var(--paper-soft) 24px);
    border: 1px dashed var(--clay-300);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--f-mono);
    font-size: 15px;
    color: var(--clay-600);
    line-height: 1.6;
    margin-bottom: 28px;
}
.contact-qr-card__title {
    font-family: var(--f-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
}
.contact-qr-card__hint { font-size: 14px; color: var(--muted); }

.contact-form {
    background: var(--paper-warm);
    border: 1px solid var(--line-soft);
    border-radius: var(--r-lg);
    padding: 40px 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--forest-700);
    margin-bottom: 8px;
}
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--line);
    border-radius: var(--r-sm);
    background: var(--paper);
    font-family: var(--f-body);
    font-size: 15px;
    color: var(--ink);
    transition: border-color var(--t-fast);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--clay-500);
}
.form-textarea { resize: vertical; min-height: 120px; }

/* ---------- 内页响应式 ---------- */
@media (max-width: 900px) {
    .founders { grid-template-columns: 1fr; }
    .belief-item { grid-template-columns: 1fr; gap: 12px; }
    .prod-detail__inner, .prod-detail--reverse .prod-detail__inner { grid-template-columns: 1fr; }
    .prod-detail--reverse .prod-detail__media { order: 0; }
    .sol-block { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .news-item { grid-template-columns: 1fr; gap: 12px; }
    .news-item__arrow { display: none; }
}
@media (max-width: 600px) {
    .value-props { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}