/* ===================================================================
   谷歌代投网站主样式表 - 科技商务风
   主色：蓝 #2563eb → 紫 #7c3aed，强调青 #06b6d4
   =================================================================== */

:root {
    /* 品牌色 */
    --c-blue: #2563eb;
    --c-blue-dark: #1d4ed8;
    --c-purple: #7c3aed;
    --c-cyan: #06b6d4;
    --c-indigo: #4f46e5;

    /* 渐变 */
    --grad-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --grad-cyan: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
    --grad-purple: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
    --grad-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);

    /* 文字色 */
    --text-1: #0f172a;
    --text-2: #334155;
    --text-3: #64748b;
    --text-4: #94a3b8;
    --text-inv: #ffffff;

    /* 背景色 */
    --bg-page: #ffffff;
    --bg-soft: #f8fafc;
    --bg-soft-2: #f1f5f9;
    --bg-dark: #0f172a;

    /* 边框 */
    --border: #e2e8f0;
    --border-soft: #f1f5f9;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);
    --shadow: 0 4px 12px rgba(15, 23, 42, .06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, .12);
    --shadow-blue: 0 12px 32px rgba(37, 99, 235, .25);

    /* 圆角 */
    --r-sm: 6px;
    --r: 10px;
    --r-md: 14px;
    --r-lg: 20px;
    --r-xl: 28px;
    --r-full: 999px;

    /* 间距 */
    --container: 1200px;

    /* 字体 */
    --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* 动画 */
    --ease: cubic-bezier(.4, 0, .2, 1);
}

/* --------------------- Reset --------------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--text-1);
    background: var(--bg-page);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--c-blue); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.main { min-height: 50vh; }

/* --------------------- 按钮 --------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--r-full);
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: all .25s var(--ease);
    white-space: nowrap;
    border: 2px solid transparent;
}
.btn--primary { background: var(--grad-primary); color: #fff; box-shadow: var(--shadow-blue); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(37, 99, 235, .35); color: #fff; }
.btn--cyan { background: var(--grad-cyan); color: #fff; box-shadow: 0 8px 24px rgba(6, 182, 212, .25); }
.btn--cyan:hover { transform: translateY(-2px); color: #fff; }
.btn--dark { background: var(--bg-dark); color: #fff; }
.btn--dark:hover { background: #1e293b; color: #fff; }
.btn--light { background: #fff; color: var(--c-blue); }
.btn--light:hover { background: #f8fafc; transform: translateY(-2px); }
.btn--outline { background: transparent; border-color: var(--border); color: var(--text-2); }
.btn--outline:hover { border-color: var(--c-blue); color: var(--c-blue); }
.btn--outline-light { background: transparent; border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn--outline-light:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn--ghost { background: var(--bg-soft-2); color: var(--text-2); }
.btn--ghost:hover { background: var(--border); }
.btn--sm { padding: 9px 18px; font-size: 14px; }
.btn--lg { padding: 15px 34px; font-size: 16px; }
.btn--block { display: flex; width: 100%; }

/* --------------------- 顶部公告条 --------------------- */
.top-bar {
    background: var(--bg-dark);
    color: #cbd5e1;
    font-size: 13px;
    padding: 8px 0;
}
.top-bar__inner { display: flex; justify-content: space-between; align-items: center; }
.top-bar__welcome { color: var(--text-4); }
.top-bar__contact { display: flex; gap: 20px; align-items: center; }
.top-bar__item { color: #cbd5e1; }
.top-bar__phone { color: #fff; font-weight: 600; }
.top-bar__phone:hover { color: var(--c-cyan); }

/* --------------------- 导航 --------------------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border-soft);
    transition: box-shadow .25s var(--ease);
}
.navbar.is-scrolled { box-shadow: var(--shadow); }
.navbar__inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.navbar__brand { display: flex; align-items: center; }
.navbar__logo { height: 40px; }
.navbar__logo-text { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: var(--text-1); letter-spacing: -.5px; }
.navbar__logo-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 10px;
    background: var(--grad-primary); color: #fff;
    font-size: 20px; font-weight: 800;
    box-shadow: var(--shadow-blue);
}
.navbar__menu { flex: 1; }
.navbar__list { display: flex; justify-content: center; gap: 6px; }
.navbar__item { position: relative; }
.navbar__link {
    display: block;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-2);
    border-radius: var(--r-full);
    transition: all .2s var(--ease);
}
.navbar__link:hover { color: var(--c-blue); background: var(--bg-soft); }
.navbar__item.is-active .navbar__link { color: var(--c-blue); font-weight: 600; }
.navbar__item.is-active::after {
    content: '';
    position: absolute;
    bottom: 2px; left: 50%;
    transform: translateX(-50%);
    width: 24px; height: 3px;
    border-radius: 2px;
    background: var(--grad-primary);
}
.navbar__actions { display: flex; align-items: center; gap: 12px; }
.navbar__toggle { display: none; width: 36px; height: 36px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.navbar__toggle span { width: 22px; height: 2px; background: var(--text-1); border-radius: 2px; transition: all .25s var(--ease); }
.navbar__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle.is-open span:nth-child(2) { opacity: 0; }
.navbar__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --------------------- Hero 通用 --------------------- */
.hero {
    position: relative;
    overflow: hidden;
    background: var(--grad-dark);
    color: #fff;
    padding: 80px 0 100px;
}
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(37, 99, 235, .35) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(124, 58, 237, .35) 0%, transparent 50%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, .07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, .07) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.hero__inner { position: relative; z-index: 2; }
.hero__breadcrumb { color: var(--text-4); font-size: 14px; margin-bottom: 16px; }
.hero__breadcrumb a { color: var(--text-4); }
.hero__breadcrumb a:hover { color: #fff; }
.hero__title {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 18px;
}
.hero__title-grad { background: linear-gradient(120deg, #60a5fa, #c4b5fd, #67e8f9); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.hero__desc { font-size: 18px; color: #cbd5e1; max-width: 700px; margin-bottom: 32px; line-height: 1.8; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 16px; border-radius: var(--r-full);
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .15);
    font-size: 13px; color: #cbd5e1;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
}
.hero__badge-dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 12px #34d399; }

/* 首页大 Hero */
.hero--home { padding: 90px 0 110px; }
.hero--home .hero__grid {
    display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center;
}
.hero__visual {
    position: relative;
    aspect-ratio: 1/1;
    max-width: 460px;
    margin-left: auto;
}
.hero__orb {
    position: absolute; inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(37, 99, 235, .4), rgba(124, 58, 237, .3) 50%, transparent 70%);
    filter: blur(20px);
}
.hero__card-stack { position: absolute; inset: 10%; }
.hero__card {
    position: absolute;
    background: rgba(255, 255, 255, .08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, .15);
    border-radius: var(--r-lg);
    padding: 20px 24px;
    color: #fff;
    box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
}
.hero__card--1 { top: 6%; left: 0; width: 64%; animation: float1 6s ease-in-out infinite; }
.hero__card--2 { bottom: 8%; right: 0; width: 60%; animation: float2 6s ease-in-out infinite; }
.hero__card--3 { top: 42%; left: 50%; transform: translateX(-50%); width: 70%; animation: float3 6s ease-in-out infinite; }
.hero__card-label { font-size: 12px; color: var(--text-4); margin-bottom: 6px; }
.hero__card-value { font-size: 26px; font-weight: 800; background: linear-gradient(120deg, #67e8f9, #c4b5fd); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero__card-trend { font-size: 12px; color: #34d399; margin-top: 4px; }
@keyframes float1 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes float2 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(10px); } }
@keyframes float3 { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-8px); } }

/* --------------------- 区块 --------------------- */
.section { padding: 90px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--bg-dark); color: #fff; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head--left { text-align: left; margin-left: 0; }
.section-eyebrow {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px;
    background: rgba(37, 99, 235, .08);
    color: var(--c-blue);
    border-radius: var(--r-full);
    font-size: 13px; font-weight: 600;
    margin-bottom: 16px;
}
.section--dark .section-eyebrow { background: rgba(255, 255, 255, .1); color: #93c5fd; }
.section-title { font-size: 36px; font-weight: 800; letter-spacing: -.5px; line-height: 1.25; margin-bottom: 16px; }
.section--dark .section-title { color: #fff; }
.section-title-grad { background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.section-sub { font-size: 17px; color: var(--text-3); line-height: 1.8; }
.section--dark .section-sub { color: #cbd5e1; }

/* --------------------- 信任栏 数据 --------------------- */
.stats { background: var(--grad-dark); color: #fff; padding: 0; }
.stats__inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding: 60px 0;
    position: relative;
}
.stats__inner::before {
    content: '';
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 15% 50%, rgba(37, 99, 235, .3), transparent 40%),
        radial-gradient(circle at 85% 50%, rgba(124, 58, 237, .3), transparent 40%);
}
.stats__item { text-align: center; position: relative; z-index: 1; }
.stats__num {
    font-size: 52px; font-weight: 800; line-height: 1;
    background: linear-gradient(120deg, #60a5fa, #c4b5fd, #67e8f9);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}
.stats__label { color: #cbd5e1; font-size: 15px; }

/* --------------------- 服务卡片 --------------------- */
.grid { display: grid; gap: 28px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--r-lg);
    padding: 32px;
    transition: all .3s var(--ease);
    position: relative;
    overflow: hidden;
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--grad-primary);
    transform: scaleX(0); transform-origin: left;
    transition: transform .35s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }

.card__icon {
    width: 60px; height: 60px;
    border-radius: var(--r-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
    background: var(--grad-primary);
    color: #fff;
    margin-bottom: 22px;
    box-shadow: var(--shadow-blue);
}
.card__icon--cyan { background: var(--grad-cyan); box-shadow: 0 8px 24px rgba(6, 182, 212, .25); }
.card__icon--purple { background: var(--grad-purple); box-shadow: 0 8px 24px rgba(124, 58, 237, .25); }
.card__icon--amber { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.card__icon--rose { background: linear-gradient(135deg, #f43f5e, #ec4899); }
.card__icon--emerald { background: linear-gradient(135deg, #10b981, #059669); }
.card__icon--indigo { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.card__title { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text-1); }
.card__desc { color: var(--text-3); font-size: 15px; line-height: 1.75; }

/* --------------------- 流程时间线 --------------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.steps::before {
    content: ''; position: absolute;
    top: 32px; left: 12%; right: 12%; height: 2px;
    background: linear-gradient(90deg, var(--c-blue), var(--c-purple));
    opacity: .3;
}
.step { text-align: center; position: relative; z-index: 1; }
.step__num {
    width: 64px; height: 64px; margin: 0 auto 20px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; font-weight: 800;
    color: var(--c-blue);
    position: relative;
    transition: all .3s var(--ease);
}
.step:hover .step__num { background: var(--grad-primary); color: #fff; border-color: transparent; transform: scale(1.05); box-shadow: var(--shadow-blue); }
.step__title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.step__desc { color: var(--text-3); font-size: 14px; line-height: 1.7; }

/* --------------------- 案例卡片 --------------------- */
.case-card {
    background: #fff;
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--border-soft);
    transition: all .3s var(--ease);
    display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card__cover { aspect-ratio: 16/9; background: var(--grad-primary); position: relative; overflow: hidden; }
.case-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.case-card__cover--grad-1 { background: linear-gradient(135deg, #2563eb, #7c3aed); }
.case-card__cover--grad-2 { background: linear-gradient(135deg, #06b6d4, #2563eb); }
.case-card__cover--grad-3 { background: linear-gradient(135deg, #7c3aed, #4f46e5); }
.case-card__cover--grad-4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.case-card__cover--grad-5 { background: linear-gradient(135deg, #10b981, #06b6d4); }
.case-card__cover--grad-6 { background: linear-gradient(135deg, #ec4899, #7c3aed); }
.case-card__cover-text { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; color: #fff; text-align: center; padding: 24px; }
.case-card__cover-icon { font-size: 40px; margin-bottom: 10px; opacity: .9; }
.case-card__cover-industry { font-size: 14px; opacity: .85; }
.case-card__body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-card__industry { font-size: 13px; color: var(--c-blue); font-weight: 600; margin-bottom: 8px; }
.case-card__title { font-size: 18px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; color: var(--text-1); }
.case-card__summary { color: var(--text-3); font-size: 14px; line-height: 1.7; flex: 1; }
.case-card__metrics { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border-soft); }
.case-card__metric { background: rgba(37, 99, 235, .06); color: var(--c-blue); font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: var(--r-sm); }

/* 大卡片（首页精选） */
.case-feature {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0;
    background: #fff; border-radius: var(--r-lg); overflow: hidden;
    border: 1px solid var(--border-soft); transition: all .3s var(--ease);
}
.case-feature:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.case-feature__cover { min-height: 280px; background: var(--grad-primary); position: relative; display: flex; align-items: center; justify-content: center; color: #fff; }
.case-feature__cover img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.case-feature__cover-content { position: relative; z-index: 2; text-align: center; padding: 32px; }
.case-feature__cover-icon { font-size: 48px; margin-bottom: 12px; }
.case-feature__body { padding: 36px; display: flex; flex-direction: column; justify-content: center; }
.case-feature__industry { font-size: 13px; color: var(--c-blue); font-weight: 600; margin-bottom: 8px; }
.case-feature__title { font-size: 22px; font-weight: 700; margin-bottom: 14px; line-height: 1.4; }
.case-feature__summary { color: var(--text-3); line-height: 1.8; margin-bottom: 20px; }
.case-feature__metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.case-feature__metric { background: var(--bg-soft); padding: 14px 16px; border-radius: var(--r); }
.case-feature__metric-label { font-size: 12px; color: var(--text-4); margin-bottom: 4px; }
.case-feature__metric-value { font-size: 22px; font-weight: 800; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* --------------------- 文章卡片 --------------------- */
.article-card {
    background: #fff;
    border-radius: var(--r-md);
    border: 1px solid var(--border-soft);
    overflow: hidden;
    transition: all .3s var(--ease);
    display: flex; flex-direction: column;
    height: 100%;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.article-card__cover { aspect-ratio: 16/9; background: var(--grad-cyan); position: relative; }
.article-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.article-card__cover--g1 { background: linear-gradient(135deg, #2563eb, #06b6d4); }
.article-card__cover--g2 { background: linear-gradient(135deg, #7c3aed, #2563eb); }
.article-card__cover--g3 { background: linear-gradient(135deg, #06b6d4, #10b981); }
.article-card__cover--g4 { background: linear-gradient(135deg, #4f46e5, #7c3aed); }
.article-card__cover--g5 { background: linear-gradient(135deg, #ec4899, #f59e0b); }
.article-card__cover--g6 { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.article-card__cover-text { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, .95); font-size: 18px; font-weight: 700; padding: 16px; text-align: center; line-height: 1.4; word-break: break-word; }
.article-card__body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.article-card__meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-4); margin-bottom: 10px; }
.article-card__title { font-size: 17px; font-weight: 700; line-height: 1.5; margin-bottom: 10px; color: var(--text-1); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card__title:hover { color: var(--c-blue); }
.article-card__excerpt { color: var(--text-3); font-size: 14px; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.article-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 14px; }
.tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--bg-soft-2);
    color: var(--text-3);
    border-radius: var(--r-sm);
    font-size: 12px;
    transition: all .2s var(--ease);
}
.tag:hover { background: rgba(37, 99, 235, .1); color: var(--c-blue); }

/* --------------------- 文章详情 --------------------- */
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; padding: 60px 0; }
.article-detail__meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--text-4); font-size: 14px; margin-bottom: 18px; align-items: center; }
.article-detail__cover { aspect-ratio: 21/9; border-radius: var(--r-lg); margin-bottom: 32px; background: var(--grad-primary); }
.article-detail__cover img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--r-lg); }

.markdown { font-size: 17px; line-height: 2; color: var(--text-2); max-width: 700px; }

/* 文章导读框 */
.article-excerpt-box {
    max-width: 700px;
    background: linear-gradient(135deg, rgba(37, 99, 235, .04), rgba(124, 58, 237, .04));
    border-left: 4px solid var(--c-blue);
    border-radius: 0 var(--r) var(--r) 0;
    padding: 20px 24px;
    margin-bottom: 32px;
}
.article-excerpt-box__label {
    display: inline-block;
    font-size: 12px; font-weight: 700; color: #fff;
    background: var(--grad-primary);
    padding: 3px 10px; border-radius: var(--r-sm);
    margin-bottom: 10px;
    letter-spacing: 1px;
}
.article-excerpt-box p {
    margin: 0; color: var(--text-2); font-size: 15px; line-height: 1.9;
}

.markdown { font-size: 17px; line-height: 2; color: var(--text-2); max-width: 700px; }
.markdown h2 {
    font-size: 24px; font-weight: 700; color: var(--text-1);
    margin: 48px 0 20px; padding-bottom: 12px;
    border-bottom: 2px solid var(--border-soft);
    position: relative;
}
.markdown h2::after {
    content: '';
    position: absolute; bottom: -2px; left: 0;
    width: 50px; height: 2px;
    background: var(--grad-primary);
    border-radius: 2px;
}
.markdown h3 {
    font-size: 20px; font-weight: 700; color: var(--text-1);
    margin: 36px 0 16px;
    padding-left: 12px;
    border-left: 3px solid var(--c-cyan);
}
.markdown h4 {
    font-size: 17px; font-weight: 700; color: var(--text-1);
    margin: 28px 0 12px;
}
.markdown p { margin-bottom: 20px; text-align: justify; }
.markdown ul, .markdown ol { margin: 20px 0; padding-left: 28px; }
.markdown ul li, .markdown ol li { margin-bottom: 10px; line-height: 1.9; }
.markdown ul li { list-style: disc; }
.markdown ul li::marker { color: var(--c-blue); }
.markdown ol li { list-style: decimal; }
.markdown ol li::marker { color: var(--c-blue); font-weight: 600; }
.markdown strong { color: var(--text-1); font-weight: 700; }
.markdown em { color: var(--c-blue); font-style: normal; background: rgba(37, 99, 235, .06); padding: 0 4px; border-radius: 4px; }
.markdown a { color: var(--c-blue); text-decoration: underline; text-underline-offset: 2px; }
.markdown a:hover { color: var(--c-purple); }
.markdown img {
    max-width: 100%; height: auto;
    border-radius: var(--r);
    margin: 24px 0;
    box-shadow: var(--shadow);
}
.markdown blockquote {
    background: rgba(37, 99, 235, .04);
    border-left: 4px solid var(--c-blue);
    padding: 18px 24px;
    margin: 24px 0;
    border-radius: 0 var(--r) var(--r) 0;
    color: var(--text-2);
    font-size: 15px;
}
.markdown blockquote p { margin-bottom: 0; }
.markdown code {
    background: var(--bg-soft-2);
    padding: 3px 8px;
    border-radius: 4px;
    font-family: "Consolas", "Monaco", "JetBrains Mono", monospace;
    font-size: 14px;
    color: var(--c-purple);
    border: 1px solid var(--border);
}
.markdown hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }
.md-table-wrap { overflow-x: auto; margin: 24px 0; border-radius: var(--r); border: 1px solid var(--border-soft); }
.md-table { width: 100%; border-collapse: collapse; }
.md-table th, .md-table td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; font-size: 15px; }
.md-table th { background: var(--bg-soft); font-weight: 700; color: var(--text-1); white-space: nowrap; }
.md-table tr:nth-child(even) td { background: var(--bg-soft); }

/* 详情页指标条 */
.metrics-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 28px 0; padding: 24px; background: var(--bg-soft); border-radius: var(--r-lg); }
.metrics-bar__item { text-align: center; }
.metrics-bar__label { font-size: 13px; color: var(--text-4); margin-bottom: 6px; }
.metrics-bar__value { font-size: 28px; font-weight: 800; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* 上下篇 */
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--border); }
.post-nav__item { padding: 18px 22px; background: var(--bg-soft); border-radius: var(--r); transition: all .25s var(--ease); border: 1px solid transparent; }
.post-nav__item:hover { background: #fff; border-color: var(--c-blue); box-shadow: var(--shadow); }
.post-nav__item--next { text-align: right; }
.post-nav__label { font-size: 12px; color: var(--text-4); margin-bottom: 4px; }
.post-nav__title { font-size: 15px; font-weight: 600; color: var(--text-2); }

/* 侧边栏 */
.sidebar__block { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--r-md); padding: 22px; margin-bottom: 24px; }
.sidebar__title { font-size: 16px; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--bg-soft-2); position: relative; }
.sidebar__title::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 40px; height: 2px; background: var(--grad-primary); }
.sidebar__tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.sidebar__list-item { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--border-soft); }
.sidebar__list-item:last-child { border-bottom: none; }
.sidebar__list-num { flex-shrink: 0; width: 22px; height: 22px; border-radius: 4px; background: var(--bg-soft-2); color: var(--text-3); font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.sidebar__list-item:nth-child(1) .sidebar__list-num { background: var(--grad-primary); color: #fff; }
.sidebar__list-item:nth-child(2) .sidebar__list-num { background: linear-gradient(135deg, #06b6d4, #2563eb); color: #fff; }
.sidebar__list-item:nth-child(3) .sidebar__list-num { background: linear-gradient(135deg, #f59e0b, #ef4444); color: #fff; }
.sidebar__list-title { font-size: 14px; line-height: 1.5; color: var(--text-2); }
.sidebar__list-title:hover { color: var(--c-blue); }

/* --------------------- 表单 --------------------- */
.form-section { padding: 80px 0; }
.form-card {
    background: #fff;
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: grid; grid-template-columns: 1fr 1fr;
    max-width: 1080px; margin: 0 auto;
}
.form-card__info {
    background: var(--grad-dark);
    color: #fff;
    padding: 48px;
    position: relative;
    overflow: hidden;
}
.form-card__info::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(37, 99, 235, .4), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, .4), transparent 40%);
}
.form-card__info-content { position: relative; z-index: 2; }
.form-card__info h3 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.form-card__info p { color: #cbd5e1; margin-bottom: 28px; line-height: 1.8; }
.form-card__info-list { display: flex; flex-direction: column; gap: 16px; }
.form-card__info-item { display: flex; gap: 14px; align-items: flex-start; }
.form-card__info-icon { flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px; background: rgba(255, 255, 255, .1); display: flex; align-items: center; justify-content: center; font-size: 18px; }
.form-card__info-text { color: #e2e8f0; }
.form-card__info-text strong { display: block; color: #fff; margin-bottom: 2px; font-size: 15px; }
.form-card__info-text span { font-size: 13px; color: #94a3b8; }

.form-card__form { padding: 48px; }
.form-card__form h3 { font-size: 24px; font-weight: 800; margin-bottom: 6px; }
.form-card__form .form-card__subtitle { color: var(--text-3); margin-bottom: 28px; font-size: 14px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 14px; font-weight: 600; color: var(--text-2); margin-bottom: 8px; }
.form-label .req { color: #ef4444; margin-left: 2px; }
.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--r);
    font-size: 15px;
    color: var(--text-1);
    background: var(--bg-soft);
    transition: all .2s var(--ease);
}
.form-control:focus { outline: none; border-color: var(--c-blue); background: #fff; box-shadow: 0 0 0 4px rgba(37, 99, 235, .1); }
textarea.form-control { resize: vertical; min-height: 110px; }
select.form-control { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 40px; }

.form-feedback { padding: 14px 18px; border-radius: var(--r); margin-bottom: 20px; font-size: 14px; }
.form-feedback--success { background: rgba(16, 185, 129, .1); color: #047857; border: 1px solid rgba(16, 185, 129, .3); }
.form-feedback--error { background: rgba(239, 68, 68, .1); color: #b91c1c; border: 1px solid rgba(239, 68, 68, .3); }

/* --------------------- 关于我们 时间线 --------------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text__lead { font-size: 18px; color: var(--text-2); line-height: 1.9; margin-bottom: 20px; }
.feature-list { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.feature-list__item { display: flex; gap: 12px; align-items: flex-start; }
.feature-list__icon { flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--grad-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; }
.feature-list__text { color: var(--text-2); }

.timeline { position: relative; padding-left: 36px; }
.timeline::before { content: ''; position: absolute; left: 11px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--c-blue), var(--c-purple)); }
.timeline__item { position: relative; padding-bottom: 32px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__dot { position: absolute; left: -36px; top: 4px; width: 24px; height: 24px; border-radius: 50%; background: #fff; border: 3px solid var(--c-blue); box-shadow: 0 0 0 4px rgba(37, 99, 235, .15); }
.timeline__year { font-size: 14px; font-weight: 700; color: var(--c-blue); margin-bottom: 4px; }
.timeline__title { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.timeline__desc { color: var(--text-3); }

/* --------------------- FAQ --------------------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--r); margin-bottom: 14px; overflow: hidden; transition: all .25s var(--ease); }
.faq-item[open] { box-shadow: var(--shadow); border-color: transparent; }
.faq-item__summary {
    padding: 20px 24px;
    font-size: 16px; font-weight: 600;
    color: var(--text-1);
    cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    list-style: none;
}
.faq-item__summary::-webkit-details-marker { display: none; }
.faq-item__icon { flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--bg-soft-2); display: flex; align-items: center; justify-content: center; color: var(--c-blue); font-size: 20px; font-weight: 400; transition: all .25s var(--ease); }
.faq-item[open] .faq-item__icon { background: var(--grad-primary); color: #fff; transform: rotate(45deg); }
.faq-item__body { padding: 0 24px 22px; color: var(--text-3); line-height: 1.8; }

/* --------------------- CTA Banner --------------------- */
.cta-banner {
    background: var(--grad-dark);
    color: #fff;
    padding: 64px 0;
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, .35), transparent 40%),
        radial-gradient(circle at 80% 50%, rgba(124, 58, 237, .35), transparent 40%);
}
.cta-banner__inner { position: relative; z-index: 2; display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap; }
.cta-banner__title { font-size: 30px; font-weight: 800; margin-bottom: 8px; }
.cta-banner__desc { color: #cbd5e1; font-size: 16px; }
.cta-banner__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* --------------------- 页脚 --------------------- */
.footer { background: #0a0f1e; color: #cbd5e1; padding: 64px 0 0; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.footer__brand { font-size: 22px; font-weight: 800; color: #fff; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.footer__intro { color: #94a3b8; line-height: 1.8; font-size: 14px; margin-bottom: 18px; }
.footer__contact p { margin-bottom: 8px; font-size: 14px; color: #cbd5e1; }
.footer__contact a:hover { color: var(--c-cyan); }
.footer__title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer__links li { margin-bottom: 10px; }
.footer__links a { color: #94a3b8; font-size: 14px; }
.footer__links a:hover { color: var(--c-cyan); }
.footer__qr { text-align: center; }
.footer__qr-img { width: 130px; height: 130px; background: #fff; border-radius: var(--r); display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; overflow: hidden; }
.footer__qr-img img { width: 100%; height: 100%; object-fit: cover; }
.footer__qr-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; color: #94a3b8; font-size: 13px; gap: 4px; height: 100%; }
.footer__qr-text { font-size: 13px; color: #94a3b8; margin-bottom: 4px; }
.footer__qr-wechat { font-size: 13px; color: #cbd5e1; }

/* ---- 友链 ---- */
.footer__links-bar {
    padding: 18px 0;
    border-top: 1px solid rgba(255,255,255,.08);
    display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
}
.footer__links-bar-title { color: #94a3b8; font-size: 13px; flex-shrink: 0; }
.footer__link-item {
    color: #94a3b8; font-size: 13px; padding: 4px 12px;
    border-radius: 4px; transition: all .2s;
    border: 1px solid rgba(255,255,255,.08);
}
.footer__link-item:hover { color: #67e8f9; border-color: rgba(103,232,249,.3); background: rgba(103,232,249,.06); }

.footer__bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 13px; color: #64748b; }
.footer__copy { color: #64748b; }
.footer__icp a, .footer__beian { color: #64748b; }
.footer__icp a:hover { color: var(--c-cyan); }

/* --------------------- 悬浮工具 --------------------- */
.float-tools { position: fixed; right: 18px; bottom: 80px; z-index: 90; display: flex; flex-direction: column; gap: 10px; }
.float-tools__item {
    width: 56px; height: 56px;
    background: #fff;
    border-radius: var(--r-md);
    box-shadow: var(--shadow-md);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--text-2);
    position: relative;
    transition: all .25s var(--ease);
    cursor: pointer;
}
.float-tools__item:hover { background: var(--grad-primary); color: #fff; transform: translateX(-4px); }
.float-tools__icon { font-size: 20px; line-height: 1; }
.float-tools__label { font-size: 11px; margin-top: 2px; }
.float-tools__item--qr .float-tools__qr {
    position: absolute; right: 70px; top: 50%; transform: translateY(-50%) scale(0);
    background: #fff; padding: 12px; border-radius: var(--r);
    box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none;
    transition: all .25s var(--ease); transform-origin: right center;
    width: 150px;
}
.float-tools__item--qr:hover .float-tools__qr { opacity: 1; transform: translateY(-50%) scale(1); }
.float-tools__qr img { width: 126px; height: 126px; object-fit: cover; border-radius: var(--r-sm); }
.float-tools__qr p { text-align: center; font-size: 12px; color: var(--text-3); margin-top: 8px; margin-bottom: 0; }

/* --------------------- 面包屑 --------------------- */
.breadcrumb { display: flex; gap: 8px; align-items: center; padding: 18px 0; font-size: 14px; color: var(--text-4); }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--c-blue); }
.breadcrumb__sep { color: var(--text-4); }
.breadcrumb__current { color: var(--text-2); }

/* --------------------- 分页 --------------------- */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 50px; flex-wrap: wrap; }
.pagination a, .pagination span {
    min-width: 40px; height: 40px; padding: 0 12px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--r-sm);
    border: 1px solid var(--border);
    color: var(--text-2); font-size: 14px;
    transition: all .2s var(--ease);
}
.pagination a:hover { border-color: var(--c-blue); color: var(--c-blue); }
.pagination .is-current { background: var(--grad-primary); color: #fff; border-color: transparent; }
.pagination .is-disabled { color: var(--text-4); cursor: not-allowed; background: var(--bg-soft); }

/* --------------------- 空状态 --------------------- */
.empty { text-align: center; padding: 80px 20px; color: var(--text-4); }
.empty__icon { font-size: 56px; margin-bottom: 16px; opacity: .5; }
.empty__text { font-size: 16px; }

/* --------------------- Toast --------------------- */
.toast {
    position: fixed; top: 100px; left: 50%; transform: translateX(-50%) translateY(-30px);
    background: var(--text-1); color: #fff;
    padding: 14px 24px; border-radius: var(--r-full);
    box-shadow: var(--shadow-lg); z-index: 1000;
    opacity: 0; pointer-events: none;
    transition: all .3s var(--ease);
    font-size: 14px; font-weight: 500;
    display: flex; align-items: center; gap: 8px;
}
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast--success { background: #10b981; }
.toast--error { background: #ef4444; }

/* --------------------- 响应式 --------------------- */
@media (max-width: 1024px) {
    .hero--home .hero__grid { grid-template-columns: 1fr; gap: 40px; }
    .hero__visual { max-width: 380px; margin: 0 auto; }
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .steps::before { display: none; }
    .article-layout { grid-template-columns: 1fr; }
    .case-feature { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .stats__inner { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
    .form-card { grid-template-columns: 1fr; }
    .form-card__info { padding: 36px; }
    .form-card__form { padding: 36px; }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .hero { padding: 50px 0 60px; }
    .hero--home { padding: 56px 0 70px; }
    .hero__title { font-size: 30px; }
    .hero__desc { font-size: 16px; }
    .hero__visual { display: none; }
    .stats__num { font-size: 38px; }

    /* 移动端导航 */
    .navbar__menu {
        position: fixed; top: 70px; left: 0; right: 0;
        background: #fff;
        max-height: 0; overflow: hidden;
        transition: max-height .35s var(--ease);
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border);
    }
    .navbar__menu.is-open { max-height: 400px; }
    .navbar__list { flex-direction: column; padding: 12px 16px; gap: 0; }
    .navbar__item { border-bottom: 1px solid var(--border-soft); }
    .navbar__item:last-child { border-bottom: none; }
    .navbar__link { padding: 14px 16px; border-radius: 0; }
    .navbar__item.is-active::after { display: none; }
    .navbar__toggle { display: flex; }
    .navbar__cta { display: none; }
    .top-bar__welcome { display: none; }

    .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .metrics-bar { grid-template-columns: repeat(2, 1fr); }
    .post-nav { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr; gap: 32px; }
    .footer__bottom { flex-direction: column; text-align: center; }
    .form-row { grid-template-columns: 1fr; }
    .case-feature__metrics { grid-template-columns: 1fr 1fr; }
    .float-tools { right: 10px; bottom: 30px; }
    .float-tools__item { width: 48px; height: 48px; }
    .float-tools__label { display: none; }
    .cta-banner__inner { text-align: center; flex-direction: column; }
    .markdown h2 { font-size: 22px; }
    .markdown h3 { font-size: 18px; }
}

@media (max-width: 480px) {
    .stats__inner { grid-template-columns: 1fr 1fr; }
    .section-title { font-size: 24px; }
    .hero__title { font-size: 26px; }
    .btn { padding: 11px 22px; font-size: 14px; }
}