/* ============================================================
   Prism · 上海棱镜新知科技有限公司 官网
   设计基调：暖白编辑感 · 大标题紧排 · 光谱色仅作点缀
   参考 Anthropic / Linear / Stripe 的浅色 hero 排版逻辑
   ============================================================ */

:root {
    /* 中性色（占页面 90%）—— 暖白，而非死白 */
    --bg: #f7f6f2;
    --bg-warm: #faf9f5;
    --bg-subtle: #efeee8;
    --bg-card: #ffffff;
    --border: #e4e2d9;
    --border-strong: #d3d0c4;
    --text: #14140f;          /* 近黑，非纯黑 */
    --text-dim: #5f5e56;
    --text-faint: #9b998e;

    /* 品牌主色：墨黑（沉稳），链接/强调用靛蓝 */
    --ink: #14140f;
    --ink-hover: #2e2d26;
    /* 强调色：严肃深墨（全站禁止蓝色文字，原蓝色强调统一改此色） */
    --brand: #2f2d26;
    --brand-hover: #14140f;

    /* 光谱色（点缀） */
    --spec-red: #ff4d5e;
    --spec-orange: #ff9a33;
    --spec-yellow: #ffce2e;
    --spec-green: #2fd08a;
    --spec-cyan: #24bcd8;
    --spec-blue: #3b74ff;
    --spec-violet: #9b5cff;
    --spectrum: linear-gradient(100deg,
        var(--spec-red), var(--spec-orange), var(--spec-yellow),
        var(--spec-green), var(--spec-cyan), var(--spec-blue), var(--spec-violet));

    /* 玻璃质感棱镜标志：半透明玻璃 + 极淡的棱镜分光反光，不用卡通彩虹 */
    --glass-mark:
        linear-gradient(135deg, rgba(255,255,255,.9) 0%, rgba(255,255,255,0) 42%),
        linear-gradient(305deg, rgba(59,116,255,.22), rgba(36,188,216,.12) 40%, rgba(155,92,255,.2)),
        linear-gradient(160deg, #eef1f6, #d7dde8);
    --glass-mark-border: rgba(120, 140, 180, .45);

    /* 3D 等距玻璃立方体标志：低饱和真实玻璃 + 微弱棱镜分光，严肃不卡通 */
    --cube-clip: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    --cube-iso:
        /* ① 顶部玻璃高光 */
        linear-gradient(138deg, rgba(255,255,255,.78) 0%, rgba(255,255,255,.12) 24%, rgba(255,255,255,0) 46%),
        /* ② 三面明暗（较实的冷调玻璃，压住底层彩虹 → 只留微弱分光） */
        conic-gradient(from 60deg,
            rgba(226,231,238,.80) 0deg 120deg,    /* 右面（中，冷灰） */
            rgba(120,132,150,.80) 120deg 240deg,  /* 左面（暗，石板灰） */
            rgba(247,249,252,.86) 240deg 360deg), /* 顶面（亮，近白） */
        /* ③ 极低饱和的棱镜分光底（真实玻璃边缘的淡彩，非霓虹） */
        conic-gradient(from 15deg,
            #b79aa0, #b8ac97, #b3b596, #9bb3a6, #98acb6, #9aa2ba, #aa9db4, #b79aa0);
    --cube-shadow: drop-shadow(0 3px 6px rgba(50, 60, 85, .26));

    --font-display: "Sora", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: "Manrope", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

    --maxw: 1240px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: background .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
    border-bottom: 1px solid transparent;
}
.site-header.scrolled {
    background: rgba(247, 246, 242, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    max-width: none;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 84px;
}
.header-inner .brand     { grid-column: 2; justify-self: center; }
.header-inner .site-nav  { grid-column: 3; justify-self: end; }
.header-inner .nav-toggle { grid-column: 3; justify-self: end; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
    width: 42px; height: 42px;
    background: var(--cube-iso);
    clip-path: var(--cube-clip);
    filter: var(--cube-shadow);
    transition: filter .4s var(--ease);
}
/* 鼠标移到 logo：柔和的棱镜微光——轻微提亮 + 缓慢呼吸的淡雅光晕，
   低饱和、慢节奏，避免高饱和彩虹旋转的卡通感 */
.brand:hover .brand-mark {
    animation: logoDisperse 6s ease-in-out infinite;
}
@keyframes logoDisperse {
    0%, 100% {
        filter: var(--cube-shadow) saturate(1.12) brightness(1.03)
                drop-shadow(0 0 6px rgba(150, 160, 195, .35));
    }
    50% {
        filter: var(--cube-shadow) saturate(1.28) brightness(1.09)
                drop-shadow(0 0 13px rgba(150, 160, 200, .5));
    }
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-cn { font-family: var(--font-display); font-weight: 700; letter-spacing: .02em; font-size: 1.32rem; color: var(--text); }
.brand-en { font-family: var(--font-mono); font-size: .72rem; color: var(--text-dim); letter-spacing: .22em; text-transform: uppercase; }

.site-nav { display: flex; gap: 44px; }
.site-nav a {
    font-size: 1.06rem; font-weight: 500;
    color: var(--text-dim);
    position: relative; padding: 6px 0;
    transition: color .3s var(--ease);
}
.site-nav a::after {
    content: ""; position: absolute; left: 0; bottom: 0;
    width: 0; height: 2px; background: var(--ink);
    transition: width .35s var(--ease);
}
.site-nav a:hover { color: var(--text); }
.site-nav a:hover::after, .site-nav a.active::after { width: 100%; }
.site-nav a.active { color: var(--text); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s var(--ease); }

/* ============================================================
   Hero —— 不对称双栏（左文案 / 右棱镜）
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-warm), var(--bg));
}
/* 首页文案靠左：容器全宽、左侧留白，把右侧空间让给立方体 */
.hero .container {
    max-width: none;
    margin: 0;
    padding-right: 0;
    padding-left: clamp(24px, 7vw, 130px);
}
/* 首页背景 ASCII 动画：铺满 hero、位于文案下层 */
.hero-ascii {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}
.hero-ascii canvas { display: block; width: 100%; height: 100%; }
/* ============================================================
   首页玻璃立方棱镜（纯 CSS 3D，无需 GPU/WebGL）
   立方体 6 面半透明玻璃 + 背后彩虹光晕 → 玻璃质感 + 色散
   ============================================================ */
.prism-stage {
    position: absolute;
    top: 0; right: 0;
    width: 56%; height: 100%;
    z-index: 3;
    display: flex; align-items: center; justify-content: center;
    perspective: 1200px;
    pointer-events: none;
}
/* 背后旋转的彩虹光晕（色散的光源） */
.prism-glow {
    position: absolute;
    width: 540px; height: 540px; border-radius: 50%;
    background: conic-gradient(from 0deg,
        #e8737f, #e0a45f, #ddca6a, #6fbf9a, #63aec0, #7d93c9, #a883c4, #e8737f);
    filter: blur(95px);
    opacity: .38;
    animation: glowSpin 30s linear infinite;
}
@keyframes glowSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 立方体 */
.prism-cube {
    position: relative;
    width: 288px; height: 288px;
    transform-style: preserve-3d;
    /* 旋转由 JS 接管（自动旋转 + 拖拽 + 惯性）；浮动仍由 CSS 独立控制 */
    transform: rotateX(-24deg) rotateY(0deg);
    animation: cubeFloat 9s ease-in-out infinite;
    pointer-events: none;         /* 命中交给扁平的 .prism-hit，立方体本身不接事件 */
    user-select: none; -webkit-user-select: none;
}
/* 扁平透明命中层：居中、覆盖立方体旋转轮廓（半空间对角线≈249px，取 460px 见方富余） */
.prism-hit {
    position: absolute;
    top: 50%; left: 50%;
    width: 460px; height: 460px;
    transform: translate(-50%, -50%);
    pointer-events: auto;
    cursor: grab;
    touch-action: none;
    z-index: 2;
}
.prism-hit.grabbing { cursor: grabbing; }
/* 拖拽期间全局禁用文本选择，避免光标划过左侧文案时选中文字 */
body.prism-dragging, body.prism-dragging * {
    user-select: none !important; -webkit-user-select: none !important;
}
.prism-cube.grabbing { cursor: grabbing; }
@keyframes cubeFloat {
    0%, 100% { margin-top: -16px; }
    50%      { margin-top: 16px; }
}

.cube-face {
    position: absolute;
    width: 288px; height: 288px;
    overflow: hidden;
    /* 半透明玻璃：白色微反光 + 极淡冷调，背后光晕透出 = 柔和分光 */
    background:
        linear-gradient(135deg, rgba(255,255,255,.46), rgba(255,255,255,.04) 44%, rgba(255,255,255,.22)),
        linear-gradient(315deg, rgba(120,140,170,.12), rgba(150,160,175,.06) 45%, rgba(160,150,170,.12));
    /* 更亮的棱边（菲涅尔反光）+ 内层玻璃光 */
    border: 1px solid rgba(255,255,255,.82);
    box-shadow:
        0 0 0 1px rgba(255,255,255,.28),
        inset 0 0 52px rgba(255,255,255,.30),
        inset 0 0 20px rgba(120,135,165,.14),
        inset 0 0 3px rgba(255,255,255,.6);
    /* 让背后的光晕透过玻璃 */
    opacity: .82;
    backface-visibility: visible;
}
/* 掠过玻璃表面的移动高光（旋转时的反光扫光） */
.cube-face::before {
    content: "";
    position: absolute; inset: -60%;
    background: linear-gradient(112deg,
        transparent 34%,
        rgba(255,255,255,.35) 44%,
        rgba(255,255,255,.85) 50%,
        rgba(255,255,255,.35) 56%,
        transparent 66%);
    transform: translateX(-70%);
    animation: glassSheen 7s ease-in-out infinite;
    pointer-events: none;
}
/* 随旋转缓慢流转的淡色散层（screen 混合，柔和不刺眼） */
.cube-face::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(135deg,
        rgba(232,115,127,.12), rgba(111,191,154,.05) 50%, rgba(125,147,201,.12));
    mix-blend-mode: screen;
    animation: dispersShift 24s linear infinite;
    pointer-events: none;
}
/* 六面高光错相位，旋转时依次反光 */
.cube-front::before  { animation-delay: 0s; }
.cube-right::before  { animation-delay: -1.75s; }
.cube-back::before   { animation-delay: -3.5s; }
.cube-left::before   { animation-delay: -5.25s; }
.cube-top::before    { animation-delay: -0.9s; }
.cube-bottom::before { animation-delay: -2.6s; }

@keyframes glassSheen {
    0%   { transform: translateX(-75%); opacity: 0; }
    12%  { opacity: 1; }
    48%  { transform: translateX(75%); opacity: 1; }
    60%, 100% { transform: translateX(75%); opacity: 0; }
}
@keyframes dispersShift {
    0%   { filter: hue-rotate(0deg); opacity: .9; }
    50%  { opacity: .5; }
    100% { filter: hue-rotate(360deg); opacity: .9; }
}
/* 立方体半边长 = 144px */
.cube-front  { transform: translateZ(144px); }
.cube-back   { transform: rotateY(180deg) translateZ(144px); }
.cube-right  { transform: rotateY(90deg)  translateZ(144px); }
.cube-left   { transform: rotateY(-90deg) translateZ(144px); }
.cube-top    { transform: rotateX(90deg)  translateZ(144px); }
.cube-bottom { transform: rotateX(-90deg) translateZ(144px); }


.hero-overlay { position: relative; z-index: 2; width: 100%; pointer-events: none; }
.hero-content { pointer-events: auto; max-width: 560px; padding-top: 40px; position: relative; }
/* 文字可读性：不用矩形衬底，改为给文字本身裹一圈厚乳白光晕——
   亮区沿字形轮廓分布，字间与段落外均露出背景动画 */
.hero-brand-cn, .hero-brand-en, .hero-title, .hero-sub {
    text-shadow:
        0 0 3px var(--bg), 0 0 3px var(--bg), 0 0 3px var(--bg), 0 0 3px var(--bg), 0 0 3px var(--bg), 0 0 3px var(--bg),
        0 0 6px var(--bg), 0 0 6px var(--bg), 0 0 6px var(--bg), 0 0 6px var(--bg), 0 0 6px var(--bg), 0 0 6px var(--bg),
        0 0 10px var(--bg), 0 0 10px var(--bg), 0 0 10px var(--bg), 0 0 10px var(--bg),
        0 0 15px var(--bg), 0 0 15px var(--bg), 0 0 15px var(--bg),
        0 0 22px var(--bg), 0 0 22px var(--bg);
}

.hero-brand {
    display: flex; flex-direction: column; gap: 4px;
    margin-bottom: 18px;
    animation: fadeUp .8s var(--ease) both;
}
.hero-brand-cn {
    font-family: var(--font-display);
    font-size: clamp(3.4rem, 8.5vw, 6.4rem);
    font-weight: 800; letter-spacing: -.01em; line-height: 1.02;
    color: var(--text);
}
.hero-brand-en {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.4vw, 2.6rem);
    font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
    color: var(--text);
}

.hero-title {
    font-family: var(--font-mono);
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: .28em;
    color: var(--brand);
    margin: 6px 0 26px;
    animation: fadeUp .8s var(--ease) .08s both;
}
.hero-sub {
    font-family: var(--font-mono);
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    font-weight: 700;
    letter-spacing: .28em;
    color: #000;
    line-height: 1.1;
    margin-bottom: 40px;
    white-space: nowrap;
    animation: fadeUp .8s var(--ease) .16s both;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; animation: fadeUp .8s var(--ease) .24s both; }

.hero-meta {
    display: flex; gap: 28px; list-style: none;
    animation: fadeUp .8s var(--ease) .32s both;
}
.hero-meta li {
    font-family: var(--font-mono);
    font-size: .8rem; color: var(--text-faint);
    position: relative; padding-left: 18px;
}
.hero-meta li::before {
    content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 6px; height: 6px; background: var(--spectrum); border-radius: 1px;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 下滑提示：向下的动态箭头（V 形 chevron，上下轻跳） */
.hero-scroll { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2; }
.hero-scroll span {
    display: block; width: 20px; height: 20px;
    border-right: 2.5px solid var(--ink);
    border-bottom: 2.5px solid var(--ink);
    transform: rotate(45deg);
    animation: scrollArrow 2.6s var(--ease) infinite;
    opacity: .4;
}
@keyframes scrollArrow {
    0%   { opacity: 0; transform: rotate(45deg) translate(-4px, -4px); }
    50%  { opacity: .45; }
    100% { opacity: 0; transform: rotate(45deg) translate(4px, 4px); }
}

/* ============================================================
   按钮（直角、纯色、无渐变）
   ============================================================ */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 30px;
    border-radius: 0;
    font-family: var(--font-body);
    font-size: .95rem; font-weight: 600;
    cursor: pointer; border: 1px solid transparent;
    transition: background .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--ink-hover); transform: translateY(-2px); }
.btn-ghost { background: var(--bg); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--ink); background: var(--bg-warm); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-outline:hover { border-color: var(--ink); background: var(--ink); color: #fff; }

/* ============================================================
   Section 通用
   ============================================================ */
.section { padding: 128px 0; position: relative; }
.section-eyebrow {
    font-family: var(--font-mono);
    font-size: .76rem; letter-spacing: .14em; text-transform: uppercase;
    color: var(--brand); margin-bottom: 18px; text-align: center;
}
.section-eyebrow::before {
    content: "// "; color: var(--text-faint);
}
.section-head { text-align: center; max-width: 660px; margin: 0 auto 72px; }
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.8vw, 2.9rem);
    font-weight: 600; line-height: 1.1; letter-spacing: -0.025em;
    margin-bottom: 20px; color: var(--text);
}
.section-desc { color: var(--text-dim); font-size: 1.08rem; }
.section-more { text-align: center; margin-top: 56px; }

/* 客户区 */
.clients-section { padding: 80px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-subtle); }
.clients-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 28px; }
.client-chip {
    font-family: var(--font-mono);
    padding: 10px 22px; border: 1px solid var(--border-strong); background: var(--bg-card);
    color: var(--text-dim); font-size: .9rem; transition: .3s var(--ease);
}
.client-chip:hover { color: var(--text); border-color: var(--ink); transform: translateY(-2px); }

/* ============================================================
   服务卡片网格
   ============================================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}
.service-card {
    background: var(--bg-card);
    padding: 38px 32px;
    transition: background .35s var(--ease);
    position: relative; overflow: hidden;
}
.service-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--spectrum); transform: scaleX(0); transform-origin: left;
    transition: transform .45s var(--ease);
}
.service-card:hover { background: var(--bg-warm); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    display: inline-flex; width: 46px; height: 46px;
    margin-bottom: 22px; position: relative;
}
.service-icon::after {
    content: ""; position: absolute; inset: 0; margin: auto;
    width: 44px; height: 44px;
    background: var(--cube-iso);
    clip-path: var(--cube-clip);
    filter: var(--cube-shadow);
}
.service-card h3 { font-family: var(--font-display); font-size: 1.12rem; margin-bottom: 12px; font-weight: 600; letter-spacing: -.01em; color: var(--text); }
.service-card p { color: var(--text-dim); font-size: .94rem; line-height: 1.6; }
.service-arrow {
    display: inline-block; margin-top: 18px;
    font-family: var(--font-mono); font-size: .82rem; color: var(--brand);
    opacity: 0; transform: translateX(-6px);
    transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.service-card:hover .service-arrow { opacity: 1; transform: translateX(0); }

/* ============================================================
   业务详情页（左侧边栏 + 右详情）
   ============================================================ */
.page-hero-sm { padding: 152px 0 56px; }
.services-detail-section { padding-top: 108px; }
.services-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 56px;
    align-items: start;
}
.services-sidebar { position: sticky; top: 104px; }
.sidebar-label {
    font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em;
    text-transform: uppercase; color: var(--text-faint);
    margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px solid var(--border);
}
.sidebar-nav { display: flex; flex-direction: column; }
.sidebar-item {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 16px; border-left: 2px solid transparent;
    color: var(--text-dim); font-size: .95rem; font-weight: 500;
    transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.sidebar-item:hover { color: var(--text); background: var(--bg-subtle); }
.sidebar-item.active { color: var(--text); border-left-color: var(--ink); background: var(--bg-card); }
.sidebar-icon {
    width: 26px; height: 26px; flex-shrink: 0; position: relative;
}
.sidebar-icon::after {
    content: ""; position: absolute; inset: 0; margin: auto;
    width: 26px; height: 26px;
    background: var(--cube-iso);
    clip-path: var(--cube-clip);
    filter: var(--cube-shadow);
}

.service-detail {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 56px 56px 48px;
    animation: fadeUp .5s var(--ease) both;
}
.detail-icon {
    display: inline-flex; width: 60px; height: 60px; position: relative;
    margin-bottom: 28px;
}
.detail-icon::after {
    content: ""; position: absolute; inset: 0; margin: auto;
    width: 60px; height: 60px;
    background: var(--cube-iso);
    clip-path: var(--cube-clip);
    filter: var(--cube-shadow);
}
.detail-title {
    font-family: var(--font-display); font-size: clamp(1.7rem, 3vw, 2.3rem);
    font-weight: 600; letter-spacing: -.02em; line-height: 1.15; color: var(--text);
    margin-bottom: 22px;
}
.detail-overview { color: var(--text-dim); font-size: 1.08rem; line-height: 1.75; margin-bottom: 40px; }
.detail-block { margin-bottom: 36px; }
.detail-subtitle {
    font-family: var(--font-mono); font-size: .8rem; letter-spacing: .06em;
    text-transform: uppercase; color: var(--brand);
    margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.detail-points { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.detail-points li {
    position: relative; padding-left: 22px; color: var(--text); font-size: .98rem; line-height: 1.5;
}
.detail-points li::before {
    content: ""; position: absolute; left: 0; top: .55em;
    width: 9px; height: 9px; background: var(--spectrum); border-radius: 2px;
}
.detail-scenes { color: var(--text-dim); font-size: 1rem; line-height: 1.75; }
.detail-more-note {
    margin-top: 22px; padding: 16px 20px;
    background: var(--bg-subtle); border-left: 2px solid var(--ink);
    color: var(--text-dim); font-size: .92rem; line-height: 1.7;
}
.detail-cta { margin-top: 44px; }

.services-grid-full { grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); }

/* ============================================================
   内页副 Hero
   ============================================================ */
.page-hero {
    padding: 176px 0 76px; text-align: center; position: relative;
    background:
        radial-gradient(70% 80% at 50% -10%, rgba(20,20,15,.045), transparent 68%),
        var(--bg-subtle);
    border-bottom: 1px solid var(--border);
}
.page-title { font-family: var(--font-display); font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 22px; color: var(--text); }
.page-lead { color: var(--text-dim); max-width: 640px; margin: 0 auto; font-size: 1.14rem; line-height: 1.7; }

/* 内页 hero 的 eyebrow 用 mono */
.page-hero .hero-eyebrow {
    background: transparent; border: none; padding: 0; margin-bottom: 20px;
    color: var(--brand); animation: none;
    letter-spacing: .14em; text-transform: uppercase; font-size: .76rem;
    display: inline-block;
}
.page-hero .hero-eyebrow::before { content: "// "; color: var(--text-faint); }

/* ============================================================
   关于页
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.about-text p { color: var(--text-dim); margin-bottom: 18px; line-height: 1.75; }
.about-text .section-title { text-align: left; margin-bottom: 26px; }
.about-values { display: flex; flex-direction: column; gap: 16px; }
.value-card {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 28px 30px; display: grid; grid-template-columns: auto 1fr; gap: 4px 22px;
}
.value-num { grid-row: 1 / 3; font-family: var(--font-mono); font-size: 1.5rem; font-weight: 500; color: var(--brand); }
.value-card h3 { font-family: var(--font-display); font-size: 1.08rem; color: var(--text); }
.value-card p { color: var(--text-dim); font-size: .92rem; margin: 0; }

/* ============================================================
   联系页
   ============================================================ */
.contact-wrap {
    display: grid; grid-template-columns: auto 1fr; gap: 72px; align-items: center;
    max-width: 940px; margin: 0 auto;
}
.contact-card {
    background: var(--bg-card); border: 1px solid var(--border);
    padding: 32px; display: inline-flex;
}
.qr-box { text-align: center; }
.qr-img {
    display: block; width: 280px; height: 280px; object-fit: contain;
    background: #fff; border: 1px solid var(--border);
}
.qr-note {
    margin-top: 20px; font-family: var(--font-display); font-size: 1rem; font-weight: 600;
    color: var(--text); letter-spacing: .02em;
}
.qr-subnote {
    margin-top: 6px; font-family: var(--font-mono); font-size: .82rem;
    color: var(--text-faint); letter-spacing: .02em;
}
.contact-detail-text.nowrap { white-space: nowrap; }
.contact-detail { max-width: 420px; }
.contact-detail-label {
    font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em;
    text-transform: uppercase; color: var(--brand); margin-bottom: 8px;
}
.contact-detail-label:not(:first-child) { margin-top: 32px; }
.contact-detail-text { color: var(--text-dim); font-size: 1rem; line-height: 1.7; }
.contact-email {
    font-size: 1.15rem; color: var(--text); word-break: break-all;
    transition: color .3s var(--ease); border-bottom: 1px solid var(--border-strong);
    padding-bottom: 2px;
}
.contact-email:hover { color: var(--brand); border-color: var(--brand); }

/* ============================================================
   关于页
   ============================================================ */
.about-statement-section { padding: 96px 0; border-bottom: 1px solid var(--border); }
.about-statement {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.6vw, 2.6rem);
    font-weight: 500; line-height: 1.35; letter-spacing: -.02em;
    color: var(--text); max-width: 900px;
}
.about-statement em { font-style: normal; color: var(--brand); }
.about-main-section { padding-top: 96px; }
.about-clients-section { background: var(--bg-subtle); border-top: 1px solid var(--border); }
.about-clients-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    margin-top: 48px; background: var(--border); border: 1px solid var(--border);
}
.about-client {
    background: var(--bg-card); padding: 36px 20px;
    display: flex; flex-direction: row; align-items: baseline;
    justify-content: center; gap: 8px; flex-wrap: nowrap; white-space: nowrap;
    transition: background .3s var(--ease);
}
.about-client:hover { background: var(--bg-warm); }
.ac-num { font-family: var(--font-display); font-size: 1.24rem; font-weight: 700; letter-spacing: -.02em; color: var(--text); white-space: nowrap; }
.ac-text { font-family: var(--font-mono); font-size: .82rem; color: var(--text-dim); white-space: nowrap; }

/* 药物管线 */
.about-pipeline-section { padding-bottom: 56px; }
.about-pipeline-lead {
    color: var(--text-dim); font-size: 1.12rem; line-height: 1.8; max-width: none; margin-top: 8px;
}
.about-pipeline-lead strong { color: var(--text); font-weight: 600; }

/* 六大计划 */
.about-plans-section { padding-top: 0; }
.plans-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 1px; background: var(--border); border: 1px solid var(--border);
}
.plan-card {
    background: var(--bg-card); padding: 40px 38px;
    position: relative; overflow: hidden;
    transition: background .35s var(--ease);
}
.plan-card::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: var(--glass-mark); opacity: 0; transition: opacity .35s var(--ease);
}
.plan-card:hover { background: var(--bg-warm); }
.plan-card:hover::before { opacity: 1; }
.plan-head { display: flex; align-items: center; gap: 18px; margin-bottom: 20px; }
.plan-code {
    font-family: var(--font-mono); font-size: 1.05rem; font-weight: 500;
    color: var(--brand);
    width: 46px; height: 46px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border-strong); border-radius: 8px;
    background: var(--bg-subtle);
}
.plan-names { display: flex; flex-direction: column; gap: 2px; }
.plan-name-cn { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; letter-spacing: -.01em; color: var(--text); line-height: 1.1; }
.plan-name-en { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; color: var(--text-faint); }
.plan-tagline {
    font-family: var(--font-display); font-size: 1.02rem; font-weight: 600;
    color: var(--text); margin-bottom: 14px;
}
.plan-desc { color: var(--text-dim); font-size: .96rem; line-height: 1.72; }

/* ============================================================
   创始团队的故事 —— 蜿蜒闯关地图（滚动驱动）
   ============================================================ */
.about-story-section { background: var(--bg-subtle); border-top: 1px solid var(--border); }

/* 地图容器：高度由 JS 依节点数设置 */
.story-map {
    position: relative;
    max-width: 960px;
    margin: 60px auto 0;
}

/* SVG 路径铺满容器 */
.story-path {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    overflow: visible;
    pointer-events: none;
    z-index: 0;
}
.story-path-base {
    stroke: rgba(20, 20, 15, .12);
    stroke-width: 2;
    stroke-linecap: butt;
    stroke-linejoin: miter;
    stroke-dasharray: 2 8;
}
.story-path-draw {
    stroke: var(--ink);
    stroke-width: 3;
    stroke-linecap: butt;
    stroke-linejoin: miter;
}

.story-runner {
    position: absolute; top: 0; left: 0;
    width: 14px; height: 14px;
    margin: -7px 0 0 -7px;
    background: var(--ink);
    border-radius: 50%;
    z-index: 4;
    opacity: 0;
    transition: opacity .4s var(--ease);
    will-change: transform;
}
.story-map.moving .story-runner { opacity: 1; }
@keyframes runnerPulse {
    0%, 100% { transform: scale(1);   opacity: .5; }
    50%      { transform: scale(1.9); opacity: 0; }
}
.story-runner::before {
    content: “”; position: absolute; inset: -3px;
    border-radius: 50%;
    background: var(--ink);
    animation: runnerPulse 1.8s var(--ease) infinite;
}

.story-node {
    position: absolute;
    left: 0; width: 100%;
    box-sizing: border-box;
    z-index: 2;
}
.story-node.left  { text-align: right; padding-right: calc(50% + 30px); }
.story-node.right { text-align: left;  padding-left:  calc(50% + 30px); }

.story-node-dot {
    position: absolute; top: 4px;
    left: 50%; margin-left: -9px;
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--border-strong);
    transition: transform .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
    z-index: 3;
}
.story-node.lit .story-node-dot {
    background: var(--ink);
    border-color: var(--ink);
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(20, 20, 15, .10);
}

.story-card {
    display: inline-block;
    text-align: left;
    max-width: 340px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px 24px;
    box-shadow: 0 2px 10px rgba(50, 60, 85, .04);
    transition: border-color .4s var(--ease), box-shadow .4s var(--ease), transform .4s var(--ease);
}
.story-node:hover .story-card {
    border-color: var(--border-strong);
    box-shadow: 0 16px 44px rgba(50, 60, 85, .12);
    transform: translateY(-3px);
}
.story-year {
    display: inline-block;
    font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em;
    color: var(--brand); font-weight: 500;
    padding: 2px 9px; margin-bottom: 9px;
    border: 1px solid var(--border-strong); border-radius: 6px;
    background: var(--bg-subtle);
}
.story-node-title {
    font-family: var(--font-display); font-size: 1.02rem; font-weight: 700;
    letter-spacing: -.01em; color: var(--text); line-height: 1.3; margin-bottom: 7px;
}
.story-node-desc { color: var(--text-dim); font-size: .84rem; line-height: 1.7; }

.story-card-link {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 12px;
    font-size: .82rem; font-weight: 600;
    color: var(--brand);
    border-bottom: 1px solid transparent;
    transition: color .3s var(--ease), border-color .3s var(--ease);
}
.story-card-link:hover { color: var(--text); border-color: var(--text); }
.story-card-link-arrow { transition: transform .3s var(--ease); }
.story-card-link:hover .story-card-link-arrow { transform: translateX(3px); }

.story-map.js .story-node { opacity: 1; }

@media (max-width: 720px) {
    .story-map { margin-top: 40px; }
    .story-node,
    .story-node.left,
    .story-node.right {
        text-align: left;
        padding-left: 52px; padding-right: 0;
    }
    .story-node-dot { left: 18px; margin-left: 0; }
    .story-card { max-width: none; width: 100%; }
}

/* ============================================================
   CTA
   ============================================================ */
.cta-section { background: var(--ink); border: none; }
.cta-inner { text-align: center; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-family: var(--font-display); font-size: clamp(2rem, 3.8vw, 2.8rem); font-weight: 600; letter-spacing: -.025em; margin-bottom: 18px; color: #fff; }
.cta-inner p { color: #b8b6ac; margin-bottom: 34px; font-size: 1.1rem; }
.cta-section .btn-primary { background: #fff; color: var(--ink); }
.cta-section .btn-primary:hover { background: var(--bg-subtle); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--bg-subtle); border-top: 1px solid var(--border); }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; padding: 72px 0 48px; }
.footer-brand .brand-en { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; letter-spacing: -.01em; color: var(--text); }
.footer-brand p { color: var(--text-dim); font-size: .92rem; margin-top: 10px; }
.footer-slogan { color: var(--text-faint) !important; font-size: .85rem !important; font-family: var(--font-mono); }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: var(--text-dim); font-size: .92rem; transition: color .3s var(--ease); }
.footer-links a:hover { color: var(--text); }
.footer-contact p { color: var(--text-dim); font-size: .92rem; margin-bottom: 10px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 24px 0; }
.footer-bottom p { color: var(--text-faint); font-size: .82rem; text-align: center; }

/* ============================================================
   滚动进入
   ============================================================ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
    .hero { min-height: auto; padding: 130px 0 90px; }
    .hero-content { padding-top: 0; text-align: center; margin: 0 auto; }
    /* 移动端：立方体作为居中背景，缩小、降透明度（scale 放在 stage 上，
       避免覆盖 JS 写在 cube 上的旋转 transform） */
    .prism-stage { width: 100%; opacity: .5; transform: scale(.7); }
    .hero-actions { justify-content: center; }
    .hero-sub { margin-left: auto; margin-right: auto; white-space: normal; }
}
@media (max-width: 860px) {
    .container { padding: 0 24px; }
    /* 移动端：导航收进右侧抽屉 */
    .site-nav {
        position: fixed; top: 76px; right: 0;
        width: 260px; height: calc(100vh - 76px);
        flex-direction: column; gap: 0;
        background: rgba(247, 246, 242, .98); backdrop-filter: blur(16px);
        border-left: 1px solid var(--border); padding: 24px;
        transform: translateX(100%); transition: transform .4s var(--ease);
    }
    .site-nav.open { transform: translateX(0); }
    .site-nav a { padding: 16px 0; border-bottom: 1px solid var(--border); }
    .nav-toggle { display: flex; }
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
    .footer-inner { grid-template-columns: 1fr; gap: 32px; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 80px 0; }
}

/* ============================================================
   彩蛋：点击 logo → 粒子 → 虫洞 → Wake up Neo → SMILES 代码雨
   ============================================================ */
.egg-overlay {
    position: fixed; inset: 0;
    z-index: 9999;
    background: #f7f6f2;
    opacity: 0;
    transition: opacity .5s ease;
    cursor: pointer;
}
.egg-overlay.show { opacity: 1; }
.egg-overlay canvas { display: block; width: 100%; height: 100%; }
.egg-hint {
    position: fixed; left: 0; right: 0; bottom: 26px;
    text-align: center;
    font-family: var(--font-mono, monospace);
    font-size: .78rem; letter-spacing: .12em;
    color: rgba(20, 20, 15, .55);
    opacity: 0;
    transition: opacity 1s ease;
    pointer-events: none;
}
.egg-hint.show { opacity: 1; }

/* ============================================================
   业务页 · 交付物清单（详情页内）
   ============================================================ */
.deliver-list { list-style: none; display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.deliver-item {
    display: flex; align-items: baseline; gap: 18px;
    background: var(--bg-card); padding: 16px 20px;
    transition: background .3s var(--ease);
}
.deliver-item:hover { background: var(--bg-warm); }
.deliver-num { font-family: var(--font-mono); font-size: .82rem; color: var(--text-faint); flex-shrink: 0; }
.deliver-text { color: var(--text); font-size: .98rem; line-height: 1.5; }

/* ============================================================
   业务页 · 通用合作流程（横向连贯时间线）
   ============================================================ */
.workflow-section { border-top: 1px solid var(--border); background: var(--bg-subtle); }
.workflow-track {
    list-style: none; display: grid;
    grid-template-columns: repeat(5, 1fr);
    margin-top: 8px;
}
.workflow-step {
    position: relative;
    padding: 0 22px;
    text-align: center;
}
/* 贯穿的连续时间线：画在每个节点圆点的垂直中心，向右延伸到下一个节点 */
.workflow-step::before {
    content: ""; position: absolute;
    top: 21px;                       /* = 节点圆点半径，使线穿过圆心 */
    left: 50%; right: -50%;
    height: 2px; background: var(--border-strong);
    z-index: 0;
}
/* 最后一个节点不再向右画线 */
.workflow-step:last-child::before { display: none; }

.workflow-node {
    position: relative; z-index: 1;
    display: inline-flex; align-items: center; justify-content: center;
    width: 42px; height: 42px; border-radius: 50%;
    background: var(--bg-card); border: 2px solid var(--border-strong);
    transition: border-color .35s var(--ease), background .35s var(--ease), transform .35s var(--ease);
}
.workflow-dot {
    position: absolute; width: 8px; height: 8px; border-radius: 50%;
    background: var(--spectrum); opacity: 0; transform: scale(0);
    transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.workflow-step-num {
    font-family: var(--font-mono); font-size: .92rem; font-weight: 600;
    color: var(--text-faint); letter-spacing: -.02em;
    transition: opacity .3s var(--ease);
}
/* hover：节点点亮，序号让位给光谱圆点 */
.workflow-step:hover .workflow-node { border-color: var(--ink); transform: scale(1.08); }
.workflow-step:hover .workflow-step-num { opacity: 0; }
.workflow-step:hover .workflow-dot { opacity: 1; transform: scale(1); }

.workflow-step-name {
    font-family: var(--font-display); font-size: 1.08rem; font-weight: 600;
    color: var(--text); margin: 20px 0 10px;
}
.workflow-step-desc { color: var(--text-dim); font-size: .88rem; line-height: 1.6; }

/* ============================================================
   业务页 · 技术栈 / 工具链
   ============================================================ */
.techstack-section { border-top: 1px solid var(--border); }
.techstack-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1px; background: var(--border); border: 1px solid var(--border);
}
.techstack-col { background: var(--bg-card); padding: 30px 26px 32px; }
.techstack-phase {
    font-family: var(--font-mono); font-size: .74rem; letter-spacing: .08em;
    color: var(--text-faint); margin-bottom: 6px;
}
.techstack-label {
    font-family: var(--font-display); font-size: 1.06rem; font-weight: 600;
    color: var(--text); margin-bottom: 18px; padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.techstack-items { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.techstack-items li {
    font-family: var(--font-mono); font-size: .9rem; color: var(--text-dim);
    padding-left: 16px; position: relative;
}
.techstack-items li::before {
    content: ""; position: absolute; left: 0; top: .5em;
    width: 6px; height: 6px; background: var(--border-strong); border-radius: 1px;
}

/* ============================================================
   关于页 · 数据统计条
   ============================================================ */
.stats-section { border-bottom: 1px solid var(--border); background: var(--bg-warm); }
.stats-row {
    display: grid; grid-template-columns: repeat(4, 1fr);
    padding-top: 0; padding-bottom: 0;
}
.stat-item {
    padding: 44px 24px; text-align: center;
    display: flex; flex-direction: column; gap: 6px;
    border-left: 1px solid var(--border);
}
.stat-item:first-child { border-left: none; }
.stat-num {
    font-family: var(--font-display); font-size: clamp(1.9rem, 3.4vw, 2.7rem);
    font-weight: 700; letter-spacing: -.03em; color: var(--text); line-height: 1;
}
.stat-label { font-family: var(--font-mono); font-size: .9rem; color: var(--text); margin-top: 8px; }
.stat-note { font-size: .82rem; color: var(--text-faint); }

/* ============================================================
   关于页 · 合作成绩
   ============================================================ */
.track-section { border-bottom: 1px solid var(--border); }
.track-head { max-width: 640px; margin-bottom: 40px; }
.track-title {
    font-family: var(--font-display); font-size: clamp(1.5rem, 2.6vw, 2.1rem);
    font-weight: 600; letter-spacing: -.02em; color: var(--text); margin-bottom: 14px;
}
.track-lead { color: var(--text-dim); font-size: 1.02rem; line-height: 1.7; }
.track-row {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1px; background: var(--border); border: 1px solid var(--border);
}
.track-item {
    background: var(--bg-card); padding: 30px 30px;
    display: flex; align-items: baseline; gap: 16px;
    transition: background .35s var(--ease); position: relative; overflow: hidden;
}
.track-item::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: var(--spectrum); transform: scaleY(0); transform-origin: top;
    transition: transform .4s var(--ease);
}
.track-item:hover { background: var(--bg-warm); }
.track-item:hover::before { transform: scaleY(1); }
.track-num {
    font-family: var(--font-display); font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 700; letter-spacing: -.03em; color: var(--text); line-height: 1; flex-shrink: 0;
}
.track-meta { display: flex; flex-direction: column; gap: 4px; }
.track-label { font-family: var(--font-mono); font-size: .9rem; color: var(--text); }
.track-note { font-size: .82rem; color: var(--text-faint); }

/* ============================================================
   关于页 · 使命愿景
   ============================================================ */
.mission-section { border-bottom: 1px solid var(--border); }
.mission-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.mission-title {
    font-family: var(--font-display); font-size: clamp(1.7rem, 3vw, 2.4rem);
    font-weight: 600; line-height: 1.2; letter-spacing: -.02em;
    color: var(--text); margin-bottom: 22px;
}
.mission-lead { color: var(--text-dim); font-size: 1.06rem; line-height: 1.8; }
.mission-points { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.mission-point {
    background: var(--bg-card); padding: 24px 28px;
    display: grid; grid-template-columns: 72px 1fr; gap: 18px; align-items: baseline;
    transition: background .3s var(--ease);
}
.mission-point:hover { background: var(--bg-warm); }
.mission-point-k {
    font-family: var(--font-mono); font-size: .84rem; letter-spacing: .04em;
    color: var(--brand);
}
.mission-point-v { color: var(--text); font-size: .98rem; line-height: 1.6; }

/* ============================================================
   关于页 · 服务对象需求 2×2
   ============================================================ */
.client-needs-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1px; margin-top: 48px; background: var(--border); border: 1px solid var(--border);
}
.client-need-card {
    background: var(--bg-card); padding: 36px 38px;
    transition: background .35s var(--ease);
}
.client-need-card:hover { background: var(--bg-warm); }
.client-need-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 14px; }
.client-need-who {
    font-family: var(--font-display); font-size: 1.32rem; font-weight: 700;
    letter-spacing: -.01em; color: var(--text);
}
.client-need-en {
    font-family: var(--font-mono); font-size: .74rem; letter-spacing: .14em;
    color: var(--text-faint);
}
.client-need-text { color: var(--text-dim); font-size: .98rem; line-height: 1.7; }

/* ============================================================
   关于页 · 合并伙伴卡片
   ============================================================ */
.partners-section { border-bottom: 1px solid var(--border); }
.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border); border: 1px solid var(--border);
}
.partner-card {
    background: var(--bg-card); padding: 28px 30px;
    display: flex; flex-direction: column; gap: 14px;
    transition: background .3s var(--ease); position: relative; overflow: hidden;
}
.partner-card::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: var(--spectrum); transform: scaleY(0); transform-origin: top;
    transition: transform .4s var(--ease);
}
.partner-card:hover { background: var(--bg-warm); }
.partner-card:hover::before { transform: scaleY(1); }
.partner-card-top {
    display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
}
.partner-num {
    font-family: var(--font-display); font-size: clamp(1.6rem, 2.6vw, 2.2rem);
    font-weight: 700; letter-spacing: -.03em; color: var(--text); line-height: 1; flex-shrink: 0;
}
.partner-labels { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.partner-label {
    font-family: var(--font-display); font-size: 1.04rem; font-weight: 600; color: var(--text);
}
.partner-en {
    font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; color: var(--text-faint);
}
.partner-note {
    font-family: var(--font-mono); font-size: .76rem; letter-spacing: .04em;
    color: var(--brand); margin-left: auto; align-self: flex-start; white-space: nowrap;
}
.partner-need { color: var(--text-dim); font-size: .92rem; line-height: 1.65; }

@media (max-width: 760px) {
    .partners-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   联系页 · 二维码 + 多通道卡片
   ============================================================ */
.contact-main {
    display: grid; grid-template-columns: auto 1fr; gap: 56px;
    align-items: start; max-width: 1000px; margin: 0 auto;
}
.contact-qr .qr-box { text-align: center; }
.channel-list { display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.channel-card {
    background: var(--bg-card); padding: 26px 30px;
    display: grid; grid-template-columns: 96px 1fr; gap: 20px; align-items: start;
    transition: background .3s var(--ease);
}
.channel-card:hover { background: var(--bg-warm); }
.channel-tag {
    font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em;
    color: var(--text-faint); padding-top: 4px;
}
.channel-name { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.channel-value { color: var(--text-dim); font-size: 1rem; line-height: 1.5; word-break: break-all; }
.channel-email {
    color: var(--text); border-bottom: 1px solid var(--border-strong);
    padding-bottom: 2px; transition: color .3s var(--ease), border-color .3s var(--ease);
}
.channel-email:hover { color: var(--brand); border-color: var(--brand); }
.channel-note { font-size: .84rem; color: var(--text-faint); margin-top: 6px; }

/* ============================================================
   联系页 · 联系前请准备 + 响应承诺
   ============================================================ */
.contact-prep-section { border-top: 1px solid var(--border); background: var(--bg-subtle); }
.contact-prep-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 64px; align-items: start; }
.prep-title {
    font-family: var(--font-display); font-size: clamp(1.5rem, 2.6vw, 2.1rem);
    font-weight: 600; letter-spacing: -.02em; color: var(--text); margin-bottom: 16px;
}
.prep-lead { color: var(--text-dim); font-size: 1.02rem; line-height: 1.7; margin-bottom: 28px; }
.prep-list { list-style: none; display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.prep-item {
    display: flex; align-items: baseline; gap: 18px;
    background: var(--bg-card); padding: 18px 22px;
}
.prep-num { font-family: var(--font-mono); font-size: .84rem; color: var(--brand); flex-shrink: 0; }
.prep-text { color: var(--text); font-size: .98rem; line-height: 1.55; }
.promise-block {
    background: var(--ink); color: #f4f3ee; padding: 36px 34px;
}
.promise-label {
    font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em;
    color: rgba(244,243,238,.55); margin-bottom: 22px;
}
.promise-item {
    padding: 18px 0; border-top: 1px solid rgba(244,243,238,.14);
    display: flex; flex-direction: column; gap: 5px;
}
.promise-item:first-of-type { border-top: none; padding-top: 0; }
.promise-k { font-family: var(--font-mono); font-size: .82rem; color: rgba(244,243,238,.6); }
.promise-v { font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; }

/* ============================================================
   联系页 · FAQ 折叠
   ============================================================ */
.contact-faq-section { border-top: 1px solid var(--border); }
.faq-list { max-width: 820px; margin: 0 auto; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
    list-style: none; cursor: pointer;
    display: flex; align-items: center; justify-content: space-between; gap: 20px;
    padding: 24px 4px;
    font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; color: var(--text);
    transition: color .25s var(--ease);
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q:hover { color: var(--brand); }
.faq-icon { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after {
    content: ""; position: absolute; background: var(--text-dim);
    transition: transform .3s var(--ease);
}
.faq-icon::before { left: 0; top: 7px; width: 16px; height: 2px; }
.faq-icon::after { left: 7px; top: 0; width: 2px; height: 16px; }
.faq-item[open] .faq-icon::after { transform: scaleY(0); }
.faq-item[open] .faq-q { color: var(--brand); }
.faq-a {
    padding: 0 4px 26px; color: var(--text-dim);
    font-size: .98rem; line-height: 1.75; max-width: 680px;
}

/* ============================================================
   新增模块 · 响应式
   ============================================================ */
@media (max-width: 1000px) {
    .workflow-track {
        grid-template-columns: 1fr;
        max-width: 460px; margin: 8px auto 0;
        text-align: left;
    }
    .workflow-step {
        display: grid; grid-template-columns: 42px 1fr;
        column-gap: 20px; padding: 0 0 34px 0; text-align: left;
    }
    .workflow-step:last-child { padding-bottom: 0; }
    /* 竖向贯穿线：沿节点圆心向下延伸到下一个节点 */
    .workflow-step::before {
        top: 42px; bottom: -2px; left: 20px; right: auto;
        width: 2px; height: auto;
    }
    .workflow-step:last-child::before { display: none; }
    .workflow-node { grid-row: 1 / 3; align-self: start; }
    .workflow-step-name { margin: 8px 0 8px; }
    .techstack-grid { grid-template-columns: repeat(2, 1fr); }
    .mission-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-prep-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 760px) {
    .stats-row { grid-template-columns: 1fr 1fr; }
    .stat-item:nth-child(2) { border-left: 1px solid var(--border); }
    .stat-item:nth-child(3) { border-left: none; border-top: 1px solid var(--border); }
    .stat-item:nth-child(4) { border-top: 1px solid var(--border); }
    .track-row { grid-template-columns: 1fr 1fr; }
    .client-needs-grid { grid-template-columns: 1fr; }
    .contact-main { grid-template-columns: 1fr; gap: 40px; justify-items: center; }
    .contact-main .channel-list { width: 100%; }
    .techstack-grid { grid-template-columns: 1fr; }
    .detail-points { grid-template-columns: 1fr; }
}