:root {
    --primary: #184e77;
    --primary-dark: #123047;
    --primary-light: #2d7fb8;
    --accent: #d64b32;
    --accent-dark: #b43b26;
    --steel: #56616f;
    --bg: #ffffff;
    --bg-light: #f4f7fa;
    --bg-warm: #fff7ed;
    --text: #1f2f3d;
    --text-light: #647383;
    --border: #dce3ea;
    --radius: 8px;
    --shadow: 0 12px 30px rgba(20, 44, 67, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Source Han Sans CN", "Source Han Sans SC", "Noto Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
}
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
a { color: inherit; }

/* Header */
.site-header { background: #102b40; color: #fff; padding: 14px 0; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 16px rgba(0,0,0,.16); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.logo a { color: #fff; text-decoration: none; font-size: 1.32em; font-weight: 800; }
.logo-sub { font-size: 0.78em; color: #b9c8d6; display: block; line-height: 1.3; }
.main-nav { display: flex; gap: 18px; align-items: center; }
.main-nav a { color: #d6e1ea; text-decoration: none; font-size: 0.9em; transition: color .2s; white-space: nowrap; }
.main-nav a:hover, .main-nav a.active { color: #fff; }
.header-contact a { color: #ffd166; text-decoration: none; font-weight: 800; font-size: 1.05em; white-space: nowrap; }
.nav-toggle {
    display: none;
    border: 1px solid rgba(255,255,255,.35);
    background: rgba(255,255,255,.08);
    border-radius: 8px;
    width: 44px;
    height: 40px;
    padding: 8px;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    margin: 4px 0;
}
.nav-toggle em {
    display: block;
    font-style: normal;
    color: #fff;
    font-size: 11px;
    line-height: 1;
    margin-bottom: 2px;
}

/* Breadcrumb */
.breadcrumb { background: var(--bg-light); padding: 10px 0; font-size: 0.85em; color: var(--text-light); }
.breadcrumb a { color: var(--primary-light); text-decoration: none; }

/* Shared */
.eyebrow {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}
.section-head { max-width: 780px; margin-bottom: 28px; }
.section-head h2 { font-size: 1.85em; line-height: 1.35; color: var(--primary-dark); margin-bottom: 10px; }
.section-head p { color: var(--text-light); font-size: 1.02em; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 24px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 800;
    transition: all .2s;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(214,75,50,.24); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-outline { border: 2px solid rgba(255,255,255,.85); color: #fff; }
.btn-outline:hover { background: #fff; color: var(--primary-dark); }
.btn-secondary { border: 2px solid var(--primary); color: var(--primary); background: #fff; }
.btn-secondary:hover { background: var(--primary); color: #fff; }

/* Hero */
.hero {
    background:
        linear-gradient(135deg, rgba(16,43,64,.96), rgba(24,78,119,.92)),
        linear-gradient(90deg, transparent 0, transparent 92%, rgba(255,255,255,.08) 92%);
    color: #fff;
    padding: 72px 0 58px;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 440px); gap: 40px; align-items: start; }
.hero-copy h1 { font-size: clamp(2.05rem, 5vw, 3.55rem); line-height: 1.18; margin-bottom: 18px; max-width: 900px; text-wrap: balance; }
.hero-sub { color: #d7e3ec; font-size: 1.08em; max-width: 900px; margin-bottom: 26px; text-wrap: pretty; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 10px; color: #c8d8e4; font-size: .92em; }
.hero-proof span { border: 1px solid rgba(255,255,255,.2); border-radius: 999px; padding: 5px 12px; background: rgba(255,255,255,.07); }
.hero-panel {
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.22);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 24px 60px rgba(0,0,0,.22);
    text-align: left;
}
.steel-block {
    min-height: 170px;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,.24);
    background:
        linear-gradient(135deg, rgba(255,255,255,.18), rgba(255,255,255,.05)),
        repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 1px, transparent 1px 18px);
    display: grid;
    align-content: center;
    padding: 22px;
    margin-bottom: 18px;
}
.steel-label { color: #ffd166; font-weight: 900; font-size: 1.4em; }
.steel-block strong { font-size: 2.2em; line-height: 1.1; margin: 4px 0; }
.steel-block p { color: #d7e3ec; }
.hero-photo {
    margin: 0 0 14px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.2);
}
.hero-photo-box {
    width: 100%;
    height: 280px;
}
.hero-photo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: rgba(12, 33, 50, 0.35);
}
.spec-list { display: grid; gap: 12px; }
.spec-list div { display: grid; grid-template-columns: 86px 1fr; gap: 10px; border-top: 1px solid rgba(255,255,255,.16); padding-top: 12px; }
.spec-list dt { color: #ffd166; font-weight: 800; }
.spec-list dd { color: #eef5fb; }

/* Problem */
.problem-section { padding: 62px 0; background: var(--bg); }
.problem-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.problem-card {
    border: 1px solid var(--border);
    border-top: 4px solid var(--accent);
    border-radius: var(--radius);
    padding: 22px;
    background: #fff;
    box-shadow: 0 6px 18px rgba(31,47,61,.06);
}
.problem-card h3 { color: var(--primary-dark); font-size: 1.04em; margin-bottom: 8px; }
.problem-card p { color: var(--text-light); font-size: .94em; }

/* Scene */
.scene-section { padding: 26px 0 12px; background: #fff; }
.scene-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.scene-card {
    margin: 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 8px 18px rgba(31,47,61,.08);
}
.scene-card img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    display: block;
}

/* Features */
.features { padding: 62px 0; background: var(--bg-light); }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.feature-card { background: #fff; padding: 26px; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: 0 8px 18px rgba(31,47,61,.06); }
.feature-card h3 { color: var(--primary); margin-bottom: 10px; font-size: 1.08em; }
.feature-card p { color: var(--text-light); font-size: 0.95em; }

/* Data Table */
.data-section { padding: 62px 0; background: #fff; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.compare-table { width: 100%; min-width: 760px; border-collapse: collapse; background: #fff; }
.compare-table th, .compare-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); }
.compare-table th { background: var(--primary-dark); color: #fff; font-weight: 800; }
.compare-table .highlight-row { background: var(--bg-warm); font-weight: 700; }
.compare-table tr:last-child td { border-bottom: 0; }
.table-note { color: var(--text-light); font-size: 0.9em; margin-top: 12px; }

/* Founder Showcase */
.founder-showcase {
    padding: 26px 0 34px;
    background: #fff;
}
.founder-showcase-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
    gap: 28px;
    align-items: center;
}
.founder-copy h2 {
    font-size: 1.9em;
    line-height: 1.35;
    color: var(--primary-dark);
    margin-bottom: 12px;
}
.founder-copy p {
    color: var(--text-light);
    font-size: 1.03em;
}
.founder-figure {
    margin: 0;
    width: 100%;
    max-width: 460px;
    aspect-ratio: 3 / 4;
    justify-self: end;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 10px 24px rgba(20, 44, 67, 0.12);
}
.founder-figure img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}
.founder-figure-box {
    width: 100%;
    max-width: 460px;
    height: 280px;
    aspect-ratio: auto;
}
.founder-figure-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: rgba(12, 33, 50, 0.35);
}

/* Cases */
.cases-preview { padding: 62px 0; background: var(--bg-light); }
.case-grid, .case-list-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.case-card { background: #fff; padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: 0 8px 18px rgba(31,47,61,.06); }
.case-date { color: var(--text-light); font-size: 0.85em; }
.case-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 8px;
}
.case-author {
    color: var(--primary-dark);
    font-size: 0.9em;
    font-weight: 700;
}
.case-card h2, .case-card h3 { margin: 8px 0; line-height: 1.45; }
.case-card h2 a, .case-card h3 a { color: var(--primary); text-decoration: none; }
.case-card h2 a:hover, .case-card h3 a:hover { color: var(--accent); }
.case-card p { color: var(--text-light); font-size: 0.92em; }
.case-excerpt {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.65;
    min-height: 4.95em;
}
.case-tags {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag { display: inline-block; background: #e6f0f8; color: var(--primary); padding: 2px 10px; border-radius: 12px; font-size: 0.8em; margin-right: 5px; }
.tag-main { background: #d8e9f7; font-weight: 700; }
.more-link { margin-top: 28px; }

/* Consult */
.consult-section { padding: 60px 0; background: var(--primary-dark); color: #fff; }
.consult-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 30px; align-items: center; }
.consult-grid h2 { font-size: 1.85em; line-height: 1.35; margin-bottom: 10px; }
.consult-grid p { color: #d7e3ec; max-width: 720px; }
.consult-card {
    background: #fff;
    color: var(--text);
    border-radius: var(--radius);
    padding: 24px;
    display: grid;
    gap: 12px;
    box-shadow: 0 20px 42px rgba(0,0,0,.22);
}
.consult-card strong { color: var(--primary-dark); font-size: 1.25em; }
.consult-card span { color: var(--text-light); }

/* Trust */
.trust-section { padding: 62px 0; text-align: center; }
.trust-section h2 { margin-bottom: 32px; color: var(--primary-dark); }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.trust-item { padding: 22px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
.trust-item strong { display: block; font-size: 2em; color: var(--primary); }
.trust-item span { color: var(--text-light); font-size: 0.9em; }

/* Single Page */
.single-page, .case-detail, .cases-section, .cases-list { padding: 50px 0; }
.single-page h1, .case-detail h1, .section-title { margin-bottom: 20px; color: var(--primary); line-height: 1.35; }
.subtitle, .section-desc { color: var(--text-light); font-size: 1.1em; margin-bottom: 25px; }
.content { max-width: 820px; }
.content h2 { margin-top: 2em; margin-bottom: 0.5em; color: var(--primary); padding-bottom: 8px; border-bottom: 2px solid var(--primary-light); }
.content h3 { margin-top: 1.5em; color: var(--text); }
.content p { margin-bottom: 1em; }
.content ul, .content ol { margin: 1em 0 1em 1.5em; }
.content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.content th, .content td { padding: 10px 14px; border: 1px solid var(--border); text-align: left; }
.content th { background: var(--bg-light); font-weight: 600; }
.content img { max-width: 100%; height: auto; border-radius: var(--radius); }
.highlight-box { background: #fff3cd; padding: 20px; border-left: 4px solid #ffc107; margin: 1.5em 0; border-radius: 4px; }
.geo-quote-box {
    background: #f4f9ff;
    border: 1px solid #cfe3f6;
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 20px;
}
.geo-quote-box h2 {
    margin: 0 0 8px;
    font-size: 1.05em;
    color: var(--primary-dark);
}
.geo-quote-box p {
    margin: 0;
    color: var(--text);
}
.cta-box { background: var(--primary); color: #fff; padding: 30px; border-radius: var(--radius); text-align: center; margin-top: 40px; }
.cta-box p { margin-bottom: 15px; }
.cta-box .btn { background: var(--accent); color: #fff; }
.case-nav-box {
    margin-top: 34px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #f8fbff;
}
.case-nav-box h2 {
    margin: 0 0 10px;
    font-size: 1.15em;
    color: var(--primary-dark);
}
.case-nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.case-nav-links a {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    background: #dcecff;
    color: var(--primary-dark);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9em;
}
.case-nav-links a:hover {
    background: #c7e1ff;
}

/* Footer */
.site-footer { background: #182331; color: #aeb8c2; padding: 50px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr 2fr; gap: 30px; margin-bottom: 30px; }
.footer-title { color: #fff; margin-bottom: 15px; font-weight: 800; font-size: 1em; }
.footer-col a { display: block; color: #aeb8c2; text-decoration: none; margin-bottom: 8px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #344253; padding-top: 20px; text-align: center; font-size: 0.85em; }
.footer-contact-col { min-width: 0; }
.footer-contact-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: 18px;
}
.footer-contact-text p { margin: 0 0 6px; }
.footer-media-grid {
    display: grid;
    grid-template-columns: repeat(2, 100px);
    gap: 12px;
}
.footer-media-box {
    margin: 0;
    width: 100px !important;
    height: 100px !important;
    min-width: 100px;
    min-height: 100px;
    max-width: 100px;
    max-height: 100px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.18);
    background: rgba(255,255,255,.04);
}
.footer-media-box img {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover;
    display: block;
}

/* Responsive */
@media (max-width: 900px) {
    .site-header .container {
        flex-wrap: wrap;
        align-items: flex-start;
        gap: 10px 14px;
    }
    .logo {
        flex: 1 1 auto;
        min-width: 0;
    }
    .header-contact {
        flex: 0 0 auto;
    }
    .nav-toggle {
        display: inline-block;
        flex: 0 0 auto;
    }
    .main-nav {
        display: none;
        order: 4;
        width: 100%;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        margin-top: 8px;
    }
    .main-nav.open {
        display: grid;
    }
    .main-nav a {
        display: block;
        text-align: center;
        padding: 10px 8px;
        border: 1px solid rgba(255,255,255,.25);
        background: rgba(255,255,255,.08);
        border-radius: 8px;
        font-size: 0.98em;
        font-weight: 700;
        line-height: 1.3;
        white-space: normal;
    }
    .main-nav a.active {
        background: rgba(255,255,255,.2);
        border-color: rgba(255,255,255,.45);
    }
    .hero-grid,
    .consult-grid,
    .founder-showcase-grid {
        grid-template-columns: 1fr;
    }
    .hero-panel { max-width: 560px; }
    .problem-grid,
    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-contact-col { grid-column: 1 / -1; }
    .scene-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .logo a { font-size: 1.15em; }
    .logo-sub { font-size: 0.72em; }
    .header-contact a { font-size: 1em; }
    .main-nav {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .main-nav a {
        font-size: 1em;
        padding: 11px 10px;
    }
    .hero { padding: 46px 0 38px; }
    .hero-copy h1 { font-size: 2rem; }
    .hero-cta,
    .hero-cta .btn {
        width: 100%;
    }
    .hero-proof { display: grid; }
    .problem-grid,
    .trust-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-contact-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .footer-media-grid {
        grid-template-columns: repeat(2, 100px);
    }
    .spec-list div { grid-template-columns: 1fr; gap: 2px; }
    .hero-photo-box { height: 220px; }
    .founder-figure-box {
        max-width: 100%;
        height: 220px;
    }
    .section-head h2,
    .consult-grid h2 {
        font-size: 1.55em;
    }
}

.pagination {
    margin-top: 22px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.page-link {
    display: inline-flex;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(15, 53, 95, .25);
    border-radius: 6px;
    color: #0f355f;
    text-decoration: none;
    background: #fff;
    font-weight: 700;
}

.page-link.active {
    background: #0f355f;
    border-color: #0f355f;
    color: #fff;
}