/* ============================================================
   中民智库 官网样式
   设计语言：藏青 + 金（专业、克制、有智库感）
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    color: #1a2233;
    background: #f7f8fa;
    line-height: 1.7;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid #C9A96E; outline-offset: 2px; border-radius: 4px; }

/* ---------- 容器 ---------- */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 860px; }

/* ---------- 颜色变量 ---------- */
:root {
    --navy-900: #0B1530;
    --navy-800: #0F1E3D;
    --navy-700: #15294D;
    --navy-600: #1E3766;
    --navy-500: #2C4A7A;
    --navy-300: #5A7296;
    --gold: #C9A96E;
    --gold-dark: #A8864A;
    --gold-light: #F5EBD6;
    --ink: #1a2233;
    --ink-2: #3d4658;
    --ink-3: #6b7688;
    --line: #e4e7ee;
    --line-2: #eef1f6;
    --bg: #f7f8fa;
    --bg-2: #ffffff;
    --shadow-sm: 0 2px 8px rgba(11,21,48,.06);
    --shadow-md: 0 8px 30px rgba(11,21,48,.10);
    --shadow-lg: 0 20px 60px rgba(11,21,48,.16);
}

/* ---------- 通用组件 ---------- */
.section { padding: 96px 0; position: relative; }
.section--alt { background: #fff; }
.section--center { min-height: 60vh; display: flex; align-items: center; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-head--split { display: flex; justify-content: space-between; align-items: flex-end; text-align: left; max-width: none; gap: 40px; flex-wrap: wrap; }
.section-foot { text-align: center; margin-top: 56px; }

.section-kicker {
    display: inline-block;
    font-size: 13px;
    letter-spacing: .18em;
    color: var(--gold-dark);
    font-weight: 600;
    margin-bottom: 14px;
    text-transform: uppercase;
}
.section-title {
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -.5px;
    color: var(--navy-900);
    line-height: 1.25;
}
.section-title-sm { font-size: 24px; font-weight: 700; color: var(--navy-900); margin-bottom: 24px; }
.section-desc { margin-top: 18px; font-size: 17px; color: var(--ink-3); line-height: 1.8; }
.section-desc strong { color: var(--navy-700); }
.head-link { color: var(--navy-600); font-weight: 600; white-space: nowrap; }

.block-title {
    font-size: 20px; font-weight: 700; color: var(--navy-900);
    margin: 36px 0 16px; padding-left: 14px; border-left: 3px solid var(--gold);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 13px 28px; font-size: 15px; font-weight: 600;
    border-radius: 6px; transition: all .25s ease; white-space: nowrap;
}
.btn-primary { background: var(--gold); color: #fff; box-shadow: 0 4px 14px rgba(201,169,110,.35); }
.btn-primary:hover { background: var(--gold-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,169,110,.45); }
.btn-outline { background: transparent; color: var(--navy-700); border: 1.5px solid var(--navy-600); }
.btn-outline:hover { background: var(--navy-800); color: #fff; transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--navy-700); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--navy-600); background: var(--navy-800); color: #fff; }
.btn-lg { padding: 16px 38px; font-size: 16px; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(11,21,48,.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,.08);
    transition: all .3s ease;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; color: #fff; }
.logo-mark { display: flex; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-cn { font-size: 19px; font-weight: 700; letter-spacing: .02em; }
.logo-en { font-size: 10px; letter-spacing: .14em; color: rgba(255,255,255,.55); text-transform: uppercase; }

.main-nav { flex: 1; display: flex; justify-content: flex-end; }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-item { position: relative; }
.nav-item > a {
    display: flex; align-items: center; gap: 4px;
    padding: 10px 16px; font-size: 15px; color: rgba(255,255,255,.82);
    border-radius: 6px; transition: all .2s;
}
.nav-item > a:hover { color: #fff; background: rgba(255,255,255,.08); }
.nav-item.is-active > a { color: var(--gold); }
.nav-item--cta > a { background: var(--gold); color: #fff !important; margin-left: 8px; }
.nav-item--cta > a:hover { background: var(--gold-dark); }

.caret { transition: transform .2s; opacity: .6; }
.nav-item:hover .caret { transform: rotate(180deg); }

.sub-menu {
    position: absolute; top: calc(100% + 8px); left: 0;
    min-width: 200px; padding: 10px;
    background: #fff; border-radius: 10px;
    box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: all .22s ease;
}
.sub-menu::before {
    content: ""; position: absolute; top: -6px; left: 24px;
    width: 12px; height: 12px; background: #fff; transform: rotate(45deg);
    border-radius: 2px;
}
.nav-item:hover .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-menu li a {
    display: block; padding: 10px 14px; font-size: 14px; color: var(--ink-2);
    border-radius: 6px; transition: all .15s;
}
.sub-menu li a:hover { background: var(--gold-light); color: var(--gold-dark); }

.mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.mobile-toggle span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center;
    background: var(--navy-900);
    overflow: hidden; padding-top: 72px;
}
.hero-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(92,114,150,.10) 1px, transparent 1px),
        linear-gradient(90deg, rgba(92,114,150,.10) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
}
.hero-glow {
    position: absolute; top: 20%; right: -10%;
    width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(201,169,110,.18) 0%, transparent 70%);
    filter: blur(40px);
}
.hero-container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; padding: 80px 24px; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 16px; border-radius: 100px;
    background: rgba(201,169,110,.14); border: 1px solid rgba(201,169,110,.3);
    color: var(--gold); font-size: 13px; margin-bottom: 28px;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 4px rgba(201,169,110,.2); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{box-shadow:0 0 0 4px rgba(201,169,110,.2)} 50%{box-shadow:0 0 0 8px rgba(201,169,110,0)} }

.hero-title {
    font-size: 64px; font-weight: 800; line-height: 1.12;
    color: #fff; letter-spacing: -1.5px;
}
.title-accent { color: var(--gold); }
.hero-subtitle { margin-top: 26px; font-size: 19px; line-height: 1.9; color: rgba(255,255,255,.78); }
.hero-subtitle em { font-style: normal; color: #fff; border-bottom: 2px solid var(--gold); padding-bottom: 1px; }

.hero-statement { margin-top: 32px; padding: 20px 24px; border-left: 3px solid var(--gold); background: rgba(255,255,255,.04); border-radius: 0 8px 8px 0; }
.statement-main { font-size: 16px; color: rgba(255,255,255,.85); }
.statement-bold { margin-top: 8px; font-size: 18px; font-weight: 700; color: var(--gold); }

.hero-actions { display: flex; gap: 14px; margin-top: 38px; flex-wrap: wrap; }

.hero-metrics { display: flex; align-items: center; gap: 28px; margin-top: 56px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,.12); }
.metric { display: flex; flex-direction: column; gap: 2px; }
.metric-num { font-size: 34px; font-weight: 800; color: #fff; letter-spacing: -1px; }
.metric-label { font-size: 13px; color: rgba(255,255,255,.55); }
.metric-sep { width: 1px; height: 34px; background: rgba(255,255,255,.14); }

/* Hero Visual */
.hero-visual { display: flex; justify-content: center; }
.visual-board {
    width: 100%; max-width: 460px;
    background: rgba(255,255,255,.06); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.14); border-radius: 14px;
    overflow: hidden; box-shadow: var(--shadow-lg);
    position: relative;
}
.board-header {
    display: flex; align-items: center; gap: 6px; padding: 12px 16px;
    background: rgba(0,0,0,.25); border-bottom: 1px solid rgba(255,255,255,.08);
}
.board-dot { width: 10px; height: 10px; border-radius: 50%; }
.board-dot.r { background: #ff5f57; } .board-dot.y { background: #febc2e; } .board-dot.g { background: #28c840; }
.board-title { margin-left: 10px; font-size: 12px; color: rgba(255,255,255,.6); }
.board-body { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.chat-line { display: flex; gap: 10px; align-items: flex-start; }
.chat-tag {
    flex-shrink: 0; width: 26px; height: 26px; border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 700; color: #fff;
}
.chat-line.user .chat-tag { background: var(--navy-600); }
.chat-line.bot .chat-tag { background: var(--gold-dark); }
.chat-text { font-size: 13.5px; color: rgba(255,255,255,.9); line-height: 1.6; padding-top: 2px; }
.chat-line.bot .chat-text { background: rgba(255,255,255,.07); padding: 8px 12px; border-radius: 0 8px 8px; }
.chat-line.user .chat-text { background: var(--navy-600); padding: 8px 12px; border-radius: 8px 0 8px 8px; }
.hl { color: var(--gold); font-weight: 600; }
.chat-line.ref { opacity: .75; }
.ref-icon { font-size: 12px; }
.ref-text { font-size: 11.5px; color: rgba(255,255,255,.5); }
.board-pulse {
    position: absolute; bottom: 16px; right: 16px; width: 8px; height: 8px;
    border-radius: 50%; background: #28c840; box-shadow: 0 0 0 0 rgba(40,200,64,.6);
    animation: pulse-green 2s infinite;
}
@keyframes pulse-green { 70%{box-shadow:0 0 0 10px rgba(40,200,64,0)} 100%{box-shadow:0 0 0 0 rgba(40,200,64,0)} }

.hero-scroll {
    position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    color: rgba(255,255,255,.4); font-size: 12px; z-index: 2;
    animation: float 2.4s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,-8px)} }

/* ============================================================
   客户卡片
   ============================================================ */
.clients { background: #fff; }
.client-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.client-card {
    position: relative; padding: 40px 32px; background: var(--bg); border-radius: 14px;
    border: 1px solid var(--line); transition: all .3s ease;
}
.client-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--gold); }
.client-card.card-featured { background: var(--navy-900); border-color: var(--navy-800); color: #fff; }
.client-card.card-featured .client-points li { color: rgba(255,255,255,.78); }
.card-ribbon {
    position: absolute; top: 20px; right: 20px; padding: 4px 12px;
    background: var(--gold); color: #fff; font-size: 12px; font-weight: 600; border-radius: 100px;
}
.client-icon { width: 56px; height: 56px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: var(--gold-light); color: var(--gold-dark); margin-bottom: 22px; }
.client-card.card-featured .client-icon { background: rgba(201,169,110,.18); color: var(--gold); }
.client-card h3 { font-size: 21px; font-weight: 700; color: var(--navy-900); margin-bottom: 10px; }
.client-card.card-featured h3 { color: #fff; }
.client-card > p { font-size: 14.5px; color: var(--ink-3); margin-bottom: 20px; }
.client-card.card-featured > p { color: rgba(255,255,255,.72); }
.client-points { display: flex; flex-direction: column; gap: 10px; }
.client-points li { font-size: 14px; color: var(--ink-3); padding-left: 18px; position: relative; }
.client-points li::before { content:""; position:absolute; left:0; top:8px; width:6px; height:6px; border-radius:50%; background:var(--gold); }
.card-more { display: inline-flex; align-items: center; gap: 4px; margin-top: 22px; font-size: 14px; font-weight: 600; color: var(--navy-600); }
.client-card.card-featured .card-more { color: var(--gold); }

/* ============================================================
   三步法
   ============================================================ */
.steps { background: var(--bg); }
.steps-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 20px; align-items: stretch; }
.step-card {
    background: #fff; border-radius: 14px; padding: 36px 30px;
    border: 1px solid var(--line); transition: all .3s; position: relative;
}
.step-card:hover { border-color: var(--gold); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-head { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 20px; }
.step-num { font-size: 44px; font-weight: 800; color: var(--gold); line-height: 1; letter-spacing: -2px; }
.step-duration { font-size: 12.5px; color: var(--ink-3); background: var(--gold-light); padding: 4px 10px; border-radius: 100px; font-weight: 600; }
.step-card h3 { font-size: 22px; font-weight: 700; color: var(--navy-900); margin-bottom: 14px; }
.step-card > p { font-size: 14.5px; color: var(--ink-3); line-height: 1.8; }
.step-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.step-tags li { font-size: 12.5px; padding: 5px 12px; background: var(--bg); border-radius: 100px; color: var(--ink-2); border: 1px solid var(--line); }
.step-link { font-size: 14px; font-weight: 600; color: var(--navy-600); }
.step-arrow { display: flex; align-items: center; color: var(--gold); opacity: .5; }

/* ============================================================
   Why Us
   ============================================================ */
.why { background: #fff; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.why-card {
    padding: 32px 28px; border-radius: 14px; background: var(--bg);
    border: 1px solid var(--line); transition: all .3s;
}
.why-card:hover { background: var(--navy-900); border-color: var(--navy-900); transform: translateY(-4px); }
.why-card:hover h3, .why-card:hover p { color: #fff; }
.why-card:hover .why-icon { background: rgba(201,169,110,.2); color: var(--gold); }
.why-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; background: var(--gold-light); color: var(--gold-dark); margin-bottom: 20px; transition: all .3s; }
.why-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-900); margin-bottom: 10px; transition: color .3s; }
.why-card p { font-size: 14px; color: var(--ink-3); line-height: 1.75; transition: color .3s; }

/* ============================================================
   解决方案预览
   ============================================================ */
.solutions-preview { background: var(--bg); }
.sol-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sol-card {
    display: block; padding: 32px; background: #fff; border-radius: 14px;
    border: 1px solid var(--line); transition: all .3s;
}
.sol-card:hover { border-color: var(--gold); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.sol-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.sol-cat { font-size: 12.5px; font-weight: 600; padding: 5px 12px; background: var(--navy-900); color: #fff; border-radius: 6px; }
.sol-arrow { font-size: 22px; color: var(--gold); transition: transform .3s; }
.sol-card:hover .sol-arrow { transform: translateX(6px); }
.sol-card h3 { font-size: 20px; font-weight: 700; color: var(--navy-900); margin-bottom: 12px; line-height: 1.4; }
.sol-card > p { font-size: 14.5px; color: var(--ink-3); line-height: 1.75; }
.sol-tech { display: block; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--ink-3); }

/* ============================================================
   技术能力
   ============================================================ */
.tech { background: #fff; }
.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.tech-card { padding: 32px; background: var(--bg); border-radius: 14px; border: 1px solid var(--line); }
.tech-card-head { margin-bottom: 24px; padding-bottom: 18px; border-bottom: 2px solid var(--gold); display: flex; align-items: baseline; gap: 12px; }
.tech-cat-cn { font-size: 19px; font-weight: 700; color: var(--navy-900); }
.tech-cat-en { font-size: 11.5px; letter-spacing: .1em; color: var(--ink-3); text-transform: uppercase; }
.tech-list { display: flex; flex-direction: column; gap: 18px; }
.tech-list li { display: flex; gap: 14px; align-items: flex-start; }
.tech-dot { flex-shrink: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); margin-top: 8px; }
.tech-list strong { display: block; font-size: 15px; color: var(--navy-900); margin-bottom: 3px; }
.tech-list p { font-size: 13.5px; color: var(--ink-3); line-height: 1.65; }

/* ============================================================
   Demo
   ============================================================ */
.demo { background: var(--navy-900); color: #fff; }
.demo .section-kicker, .demo .section-title { color: #fff; }
.demo .section-desc { color: rgba(255,255,255,.7); }
.demo-wrap { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.demo-head { text-align: left; max-width: none; margin-bottom: 0; }

.demo-chat {
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
    border-radius: 14px; overflow: hidden; backdrop-filter: blur(8px);
}
.demo-messages { padding: 24px; min-height: 320px; max-height: 420px; overflow-y: auto; display: flex; flex-direction: column; gap: 16px; }
.demo-messages::-webkit-scrollbar { width: 6px; }
.demo-messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 3px; }
.msg { display: flex; gap: 12px; align-items: flex-start; animation: msgIn .35s ease; }
@keyframes msgIn { from{opacity:0; transform:translateY(8px)} to{opacity:1; transform:translateY(0)} }
.msg.user { flex-direction: row-reverse; }
.msg-avatar {
    flex-shrink: 0; width: 32px; height: 32px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; color: #fff; background: var(--gold-dark);
}
.msg.user .msg-avatar { background: var(--navy-500); }
.msg-body { max-width: 82%; padding: 12px 16px; border-radius: 0 10px 10px 10px; background: rgba(255,255,255,.09); font-size: 14.5px; line-height: 1.65; }
.msg.user .msg-body { background: var(--navy-600); border-radius: 10px 0 10px 10px; }
.msg-suggestions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.sug-btn { font-size: 12.5px; padding: 7px 14px; border-radius: 100px; background: rgba(201,169,110,.16); color: var(--gold); border: 1px solid rgba(201,169,110,.3); transition: all .2s; text-align: left; }
.sug-btn:hover { background: var(--gold); color: #fff; }

.demo-form { display: flex; gap: 8px; padding: 16px; border-top: 1px solid rgba(255,255,255,.1); }
.demo-form input { flex: 1; padding: 12px 16px; border-radius: 8px; border: 1px solid rgba(255,255,255,.15); background: rgba(0,0,0,.2); color: #fff; font-size: 14.5px; outline: none; transition: border .2s; }
.demo-form input::placeholder { color: rgba(255,255,255,.4); }
.demo-form input:focus { border-color: var(--gold); }
.demo-form button { width: 46px; height: 46px; border-radius: 8px; background: var(--gold); color: #fff; display: flex; align-items: center; justify-content: center; transition: background .2s; flex-shrink: 0; }
.demo-form button:hover { background: var(--gold-dark); }
.demo-form button:disabled { opacity: .5; cursor: not-allowed; }

.demo-side h3 { font-size: 18px; margin-bottom: 18px; }
.demo-side ul { display: flex; flex-direction: column; gap: 14px; }
.demo-side li { font-size: 14px; color: rgba(255,255,255,.72); line-height: 1.6; }
.demo-side li strong { color: var(--gold); }
.demo-note { margin-top: 24px; padding: 14px 16px; background: rgba(255,255,255,.05); border-radius: 8px; font-size: 12.5px; color: rgba(255,255,255,.5); border-left: 2px solid var(--gold); }

/* ============================================================
   案例预览
   ============================================================ */
.cases-preview { background: var(--bg); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { padding: 32px; background: #fff; border-radius: 14px; border: 1px solid var(--line); transition: all .3s; position: relative; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--gold); }
.case-card--featured { background: var(--navy-900); border-color: var(--navy-800); color: #fff; }
.case-card--featured h3, .case-card--featured .case-result { color: #fff; }
.case-card--featured p { color: rgba(255,255,255,.72); }
.case-tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 4px 12px; background: var(--gold-light); color: var(--gold-dark); border-radius: 100px; margin-bottom: 18px; }
.case-card--featured .case-tag { background: var(--gold); color: #fff; }
.case-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-900); margin-bottom: 14px; line-height: 1.4; }
.case-card p { font-size: 14px; color: var(--ink-3); line-height: 1.75; }
.case-result { display: block; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 600; color: var(--navy-700); }

/* ============================================================
   文章
   ============================================================ */
.articles-preview { background: #fff; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card { display: block; padding: 32px; background: var(--bg); border-radius: 14px; border: 1px solid var(--line); transition: all .3s; }
.article-card:hover { border-color: var(--gold); background: #fff; box-shadow: var(--shadow-md); transform: translateY(-4px); }
.article-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; font-size: 12.5px; color: var(--ink-3); }
.article-cat { padding: 4px 10px; background: var(--gold-light); color: var(--gold-dark); border-radius: 4px; font-weight: 600; }
.article-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-900); margin-bottom: 12px; line-height: 1.45; }
.article-card p { font-size: 14px; color: var(--ink-3); line-height: 1.7; margin-bottom: 20px; }
.article-foot { display: flex; align-items: center; justify-content: space-between; font-size: 13.5px; font-weight: 600; color: var(--navy-600); }

/* ============================================================
   CTA
   ============================================================ */
.cta { background: var(--bg); padding: 0 0 96px; }
.cta-wrap {
    background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 100%);
    border-radius: 20px; padding: 60px 64px;
    display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap;
    position: relative; overflow: hidden;
}
.cta-wrap::after {
    content:""; position:absolute; right:-80px; top:-80px; width:300px; height:300px;
    border-radius:50%; background:radial-gradient(circle, rgba(201,169,110,.2), transparent 70%);
}
.cta-text { position: relative; z-index: 2; }
.cta-text h2 { font-size: 34px; font-weight: 800; color: #fff; letter-spacing: -.5px; }
.cta-text p { margin-top: 12px; font-size: 16px; color: rgba(255,255,255,.75); }
.cta-actions { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; position: relative; z-index: 2; }
.cta-price { font-size: 13.5px; color: rgba(255,255,255,.55); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--navy-900); color: rgba(255,255,255,.7); padding: 72px 0 32px; }
.footer-top { display: grid; grid-template-columns: 1.2fr 3fr; gap: 60px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-logo { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-slogan { font-size: 14px; color: var(--gold); margin-bottom: 18px; }
.footer-statement { font-size: 13.5px; color: rgba(255,255,255,.6); line-height: 1.8; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: 13.5px; color: rgba(255,255,255,.6); transition: color .2s; }
.footer-col ul a:hover { color: var(--gold); }
.contact-info li { font-size: 13.5px; color: rgba(255,255,255,.6); display: flex; gap: 8px; }
.contact-info span { color: rgba(255,255,255,.35); flex-shrink: 0; }

.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 32px; font-size: 12.5px; color: rgba(255,255,255,.4); flex-wrap: wrap; gap: 16px; }
.footer-meta { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-meta a:hover { color: var(--gold); }

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
    position: fixed; right: 28px; bottom: 28px; z-index: 99;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--navy-900); color: #fff;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-md); opacity: 0; visibility: hidden;
    transition: all .3s; border: 1px solid rgba(255,255,255,.1);
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--gold); transform: translateY(-3px); }

/* ============================================================
   页面通用 Hero
   ============================================================ */
.page-hero {
    background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-700) 100%);
    padding: 140px 0 80px; color: #fff; position: relative; overflow: hidden;
}
.page-hero::after {
    content:""; position:absolute; right:-120px; bottom:-120px; width:400px; height:400px;
    border-radius:50%; background:radial-gradient(circle, rgba(201,169,110,.12), transparent 70%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 46px; font-weight: 800; letter-spacing: -.8px; margin: 12px 0 18px; }
.page-hero p { font-size: 17px; color: rgba(255,255,255,.72); max-width: 680px; line-height: 1.8; }
.page-hero--compact { padding: 130px 0 56px; }
.page-hero--article { padding: 130px 0 56px; }

.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,.5); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: rgba(255,255,255,.6); transition: color .2s; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span[aria-current="page"] { color: var(--gold); }

.hero-tags { display: flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }
.hero-tag { font-size: 13px; padding: 6px 14px; background: rgba(201,169,110,.16); border: 1px solid rgba(201,169,110,.3); border-radius: 100px; color: var(--gold); }

/* ============================================================
   内容排版（prose）
   ============================================================ */
.prose { font-size: 16px; color: var(--ink-2); line-height: 1.9; }
.prose h2 { font-size: 26px; font-weight: 700; color: var(--navy-900); margin: 48px 0 20px; letter-spacing: -.3px; }
.prose h3 { font-size: 19px; font-weight: 700; color: var(--navy-900); margin: 32px 0 14px; }
.prose-body { white-space: pre-line; }
.prose p { margin-bottom: 18px; }
.prose ul { margin: 0 0 18px 0; padding-left: 0; }
.prose ul li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.prose ul li::before { content:""; position:absolute; left:4px; top:11px; width:6px; height:6px; border-radius:50%; background:var(--gold); }

.pain-list li { position: relative; padding-left: 26px; margin-bottom: 12px; color: var(--ink-2); }
.pain-list li::before { content:"!"; position:absolute; left:0; top:0; width:18px; height:18px; border-radius:50%; background:rgba(201,169,110,.16); color:var(--gold-dark); font-size:11px; font-weight:700; display:flex; align-items:center; justify-content:center; }

.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.feature-item { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; background: var(--bg); border-radius: 10px; border: 1px solid var(--line); font-size: 14.5px; color: var(--ink-2); }
.feature-check { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--gold); color: #fff; font-size: 12px; display: flex; align-items: center; justify-content: center; font-weight: 700; }

.belief-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 24px 0; }
.belief-card { padding: 28px; background: var(--gold-light); border-radius: 12px; }
.belief-card h3 { font-size: 18px; font-weight: 700; color: var(--navy-900); margin-bottom: 10px; }
.belief-card p { font-size: 14.5px; color: var(--ink-3); line-height: 1.75; }

.boundary { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 24px 0; }
.boundary-col { padding: 28px; border-radius: 12px; }
.boundary-do { background: #eef7f0; }
.boundary-dont { background: #fbeeee; }
.boundary-col h3 { font-size: 17px; font-weight: 700; margin-bottom: 16px; color: var(--navy-900); }
.boundary-col ul { padding: 0; }
.boundary-col li { padding-left: 22px; margin-bottom: 10px; font-size: 14.5px; color: var(--ink-2); }
.boundary-col li::before { content:"✓"; position:absolute; left:0; color:var(--gold-dark); font-weight:700; }
.boundary-dont li::before { content:"✗"; color:#c0392b; }

.prose-cta { margin-top: 56px; padding: 40px; background: var(--navy-900); border-radius: 16px; color: #fff; text-align: center; }
.prose-cta h2 { color: #fff; margin-top: 0; font-size: 24px; }
.prose-cta p { color: rgba(255,255,255,.72); margin-bottom: 28px; }
.prose-cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   解决方案详情
   ============================================================ */
.sol-detail-grid { display: flex; flex-direction: column; gap: 40px; }
.sol-detail-card { padding: 48px; background: #fff; border-radius: 16px; border: 1px solid var(--line); }
.sol-detail-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.sol-detail-head h2 { font-size: 28px; font-weight: 700; color: var(--navy-900); }
.sol-detail-summary { font-size: 17px; color: var(--navy-600); font-weight: 500; margin: 12px 0 24px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.sol-detail-desc { white-space: pre-line; color: var(--ink-2); line-height: 1.9; }
.sol-detail-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ============================================================
   服务
   ============================================================ */
.service-flow { display: flex; align-items: stretch; }
.service-detail-card { flex: 1; padding: 40px; background: #fff; border-radius: 16px; border: 1px solid var(--line); }
.service-head { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 24px; }
.service-num { font-size: 40px; font-weight: 800; color: var(--gold); line-height: 1; letter-spacing: -2px; }
.service-head h2 { font-size: 24px; font-weight: 700; color: var(--navy-900); }
.service-short { font-size: 14.5px; color: var(--gold-dark); margin-top: 6px; }
.service-meta { display: flex; gap: 32px; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 24px; font-size: 14px; color: var(--ink-3); }
.service-meta strong { color: var(--navy-700); }
.service-desc { white-space: pre-line; color: var(--ink-2); line-height: 1.9; }
.deliver-list { display: flex; flex-direction: column; gap: 12px; }
.deliver-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; color: var(--ink-2); }
.deliver-list--grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.deliver-check { font-size: 15px; }
.service-actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.service-arrow { display: flex; align-items: center; padding: 0 16px; color: var(--gold); opacity: .5; }

.combo-box { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding: 40px; background: var(--navy-900); border-radius: 16px; color: #fff; }
.combo-box h2 { font-size: 26px; font-weight: 700; margin-bottom: 10px; }
.combo-box p { color: rgba(255,255,255,.72); }
.combo-price { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.combo-range { font-size: 32px; font-weight: 800; color: var(--gold); }
.combo-note { font-size: 13px; color: rgba(255,255,255,.55); }

/* ============================================================
   案例详情
   ============================================================ */
.case-list { display: flex; flex-direction: column; gap: 32px; }
.case-detail-card { padding: 40px; background: #fff; border-radius: 16px; border: 1px solid var(--line); }
.case-detail-head { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.case-detail-head h2 { font-size: 22px; font-weight: 700; color: var(--navy-900); margin: 12px 0 8px; }
.case-client { font-size: 13.5px; color: var(--ink-3); }
.case-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.case-block { padding: 24px; background: var(--bg); border-radius: 12px; }
.case-block--full { grid-column: 1 / -1; }
.case-block h3 { font-size: 16px; font-weight: 700; color: var(--navy-900); margin-bottom: 12px; }
.case-block p { font-size: 14.5px; color: var(--ink-2); line-height: 1.8; }

/* ============================================================
   文章列表 & 详情
   ============================================================ */
.article-list { display: flex; flex-direction: column; gap: 24px; }
.article-list-item { display: block; padding: 32px; background: #fff; border-radius: 14px; border: 1px solid var(--line); transition: all .3s; }
.article-list-item:hover { border-color: var(--gold); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.article-list-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 13px; color: var(--ink-3); }
.article-list-item h2 { font-size: 22px; font-weight: 700; color: var(--navy-900); margin-bottom: 12px; line-height: 1.4; }
.article-list-item p { font-size: 14.5px; color: var(--ink-3); line-height: 1.75; margin-bottom: 20px; }
.article-list-foot { display: flex; align-items: center; justify-content: space-between; }
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { font-size: 12.5px; padding: 3px 10px; background: var(--bg); border-radius: 100px; color: var(--ink-3); }
.read-more { font-size: 13.5px; font-weight: 600; color: var(--navy-600); white-space: nowrap; }

.empty-state { text-align: center; padding: 80px 0; color: var(--ink-3); }

.article-head { padding-bottom: 40px; border-bottom: 1px solid var(--line); margin-bottom: 48px; }
.article-cat--lg { display: inline-block; font-size: 13px; font-weight: 600; padding: 5px 14px; background: var(--gold-light); color: var(--gold-dark); border-radius: 6px; margin-bottom: 20px; }
.article-head h1 { font-size: 38px; font-weight: 800; color: var(--navy-900); line-height: 1.3; letter-spacing: -.5px; }
.article-summary { margin-top: 18px; font-size: 18px; color: var(--ink-3); line-height: 1.8; }
.article-meta-line { margin-top: 24px; display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--ink-3); flex-wrap: wrap; }

.article-content { font-size: 16.5px; color: var(--ink-2); line-height: 1.95; }
.article-content h1, .article-content h2, .article-content h3 { color: var(--navy-900); font-weight: 700; margin: 40px 0 18px; line-height: 1.4; }
.article-content h1 { font-size: 28px; } .article-content h2 { font-size: 24px; } .article-content h3 { font-size: 20px; }
.article-content h1:first-child, .article-content h2:first-child, .article-content h3:first-child { margin-top: 0; }
.article-content p { margin-bottom: 20px; }
.article-content ol { margin: 0 0 20px 0; padding-left: 0; counter-reset: item; }
.article-content ol li { position: relative; padding-left: 32px; margin-bottom: 12px; counter-increment: item; }
.article-content ol li::before { content: counter(item); position: absolute; left: 0; top: 2px; width: 22px; height: 22px; border-radius: 6px; background: var(--gold-light); color: var(--gold-dark); font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.article-content strong { color: var(--navy-800); font-weight: 700; }
.article-content pre { background: var(--navy-900); color: #e2e8f0; padding: 24px; border-radius: 12px; overflow-x: auto; margin: 24px 0; font-size: 13.5px; line-height: 1.6; }
.article-content code { font-family: "SF Mono", "Cascadia Code", Consolas, monospace; font-size: 0.9em; }
.article-content pre code { color: inherit; }
.article-content p code { background: var(--gold-light); color: var(--gold-dark); padding: 2px 8px; border-radius: 4px; }

.related-box { margin-top: 64px; padding-top: 48px; border-top: 2px solid var(--line); }
.related-box h2 { font-size: 24px; font-weight: 700; color: var(--navy-900); margin-bottom: 28px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.related-card { display: block; padding: 24px; background: var(--bg); border-radius: 12px; border: 1px solid var(--line); transition: all .3s; }
.related-card:hover { border-color: var(--gold); background: #fff; box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.related-card h3 { font-size: 16px; font-weight: 700; color: var(--navy-900); margin-bottom: 10px; line-height: 1.4; }
.related-card p { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; }

.article-cta { margin-top: 64px; padding: 48px; background: var(--navy-900); border-radius: 16px; text-align: center; color: #fff; }
.article-cta h2 { color: #fff; font-size: 26px; font-weight: 700; margin-bottom: 14px; }
.article-cta p { color: rgba(255,255,255,.72); margin-bottom: 28px; }

/* ============================================================
   关于
   ============================================================ */
.related-grid--about { grid-template-columns: repeat(3, 1fr); }

/* ============================================================
   联系页
   ============================================================ */
.contact-wrap { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.contact-info-box { padding: 36px; background: var(--navy-900); border-radius: 16px; color: #fff; position: sticky; top: 100px; }
.contact-info-box h2 { font-size: 22px; font-weight: 700; margin-bottom: 28px; }
.contact-list { display: flex; flex-direction: column; gap: 22px; }
.contact-list li { display: flex; gap: 14px; align-items: flex-start; }
.contact-icon { font-size: 18px; }
.contact-list strong { display: block; font-size: 12.5px; color: rgba(255,255,255,.5); font-weight: 600; margin-bottom: 2px; }
.contact-list span { font-size: 14.5px; }
.contact-tips { margin-top: 32px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.12); }
.contact-tips h3 { font-size: 15px; font-weight: 700; color: var(--gold); margin-bottom: 14px; }
.contact-tips ul { padding: 0; }
.contact-tips li { font-size: 13.5px; color: rgba(255,255,255,.65); padding-left: 20px; margin-bottom: 10px; position: relative; line-height: 1.6; }
.contact-tips li::before { content:""; position:absolute; left:4px; top:9px; width:5px; height:5px; border-radius:50%; background:var(--gold); }

.contact-form { background: #fff; padding: 40px; border-radius: 16px; border: 1px solid var(--line); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--navy-900); margin-bottom: 8px; }
.req { color: #c0392b; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 13px 16px; font-size: 15px; font-family: inherit;
    border: 1.5px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
    transition: border .2s, box-shadow .2s; outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,169,110,.12); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-actions { margin-top: 8px; }
.form-note { font-size: 12.5px; color: var(--ink-3); margin-top: 14px; }
.form-alert { margin-top: 20px; padding: 14px 18px; border-radius: 8px; font-size: 14px; }
.form-alert.success { background: #eef7f0; color: #1e7e34; border: 1px solid #b7e2c2; }
.form-alert.error { background: #fbeeee; color: #c0392b; border: 1px solid #f2cfcb; }

/* ============================================================
   404
   ============================================================ */
.error-box { text-align: center; }
.error-code { font-size: 96px; font-weight: 800; color: var(--gold); line-height: 1; }
.error-box h1 { font-size: 28px; font-weight: 700; color: var(--navy-900); margin: 16px 0; }
.error-box p { color: var(--ink-3); margin-bottom: 32px; }
.error-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   跳过链接（无障碍）
   ============================================================ */
.skip-link { position: absolute; left: -9999px; top: 0; padding: 8px 16px; background: var(--gold); color: #fff; z-index: 999; border-radius: 0 0 6px 0; }
.skip-link:focus { left: 0; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; gap: 48px; }
    .hero-visual { order: -1; }
    .visual-board { max-width: 420px; }
    .hero-title { font-size: 48px; }
    .client-grid { grid-template-columns: 1fr; }
    .steps-flow { grid-template-columns: 1fr; }
    .step-arrow { transform: rotate(90deg); justify-content: center; padding: 4px 0; }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: 1fr; }
    .demo-wrap { grid-template-columns: 1fr; gap: 32px; }
    .case-grid { grid-template-columns: 1fr; }
    .article-grid { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr; gap: 40px; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); }
    .contact-wrap { grid-template-columns: 1fr; }
    .contact-info-box { position: static; }
    .feature-grid { grid-template-columns: 1fr; }
    .belief-grid { grid-template-columns: 1fr; }
    .boundary { grid-template-columns: 1fr; }
    .case-detail-grid { grid-template-columns: 1fr; }
    .sol-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .deliver-list--grid { grid-template-columns: 1fr; }
    .service-flow { flex-direction: column; }
    .service-arrow { transform: rotate(90deg); justify-content: center; padding: 4px 0; }
    .combo-box { flex-direction: column; align-items: stretch; }
    .combo-price { text-align: left; align-items: flex-start; }
}

@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-head { margin-bottom: 44px; }
    .section-title { font-size: 28px; }
    .section-head--split { flex-direction: column; align-items: flex-start; gap: 16px; }

    .main-nav { display: none; position: fixed; top: 72px; left: 0; right: 0; bottom: 0; background: var(--navy-900); padding: 24px; flex-direction: column; overflow-y: auto; }
    .main-nav.is-open { display: flex; }
    .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
    .nav-item > a { padding: 14px 16px; font-size: 16px; border-radius: 8px; }
    .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: rgba(255,255,255,.05); margin-top: 4px; padding: 8px 0 8px 16px; border-radius: 8px; }
    .sub-menu::before { display: none; }
    .sub-menu li a { color: rgba(255,255,255,.7); }
    .sub-menu li a:hover { background: rgba(255,255,255,.08); color: var(--gold); }
    .mobile-toggle { display: flex; }

    .hero { min-height: auto; padding-bottom: 60px; }
    .hero-container { padding: 48px 24px 60px; }
    .hero-title { font-size: 34px; }
    .hero-subtitle { font-size: 16px; }
    .hero-metrics { gap: 18px; margin-top: 40px; }
    .metric-num { font-size: 26px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { width: 100%; }

    .page-hero { padding: 110px 0 56px; }
    .page-hero h1 { font-size: 32px; }
    .page-hero--compact { padding: 110px 0 40px; }

    .form-row { grid-template-columns: 1fr; gap: 0; }
    .contact-form { padding: 28px 20px; }
    .cta-wrap { padding: 40px 28px; }
    .cta-text h2 { font-size: 26px; }
    .cta-actions { align-items: stretch; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .sol-detail-card { padding: 28px 20px; }
    .case-detail-card { padding: 28px 20px; }
    .article-head h1 { font-size: 28px; }
    .article-cta { padding: 32px 24px; }
    .prose-cta { padding: 32px 24px; }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .hero-title { font-size: 30px; }
    .section-title { font-size: 24px; }
    .footer-cols { grid-template-columns: 1fr; }
    .tech-card { padding: 24px 20px; }
    .step-card { padding: 28px 22px; }
    .why-card { padding: 26px 22px; }
    .client-card { padding: 32px 24px; }
}

/* 打印样式 */
@media print {
    .site-header, .site-footer, .back-top, .hero-scroll { display: none; }
    .hero { min-height: auto; padding: 40px 0; }
    body { background: #fff; }
}