/* =========================================================================
   jiang88.net · 个人主页样式 —— 明净青绿 · 专业浅色主题
   Mist-white canvas · graphite type · teal primary · warm amber accents.
   变量名沿用旧版，保证 HTML 内联样式与现有组件继续复用。
   ========================================================================= */
:root {
    /* ---- 青绿、石墨与暖金 ---- */
    --primary: #0f766e;
    --primary-dark: #0b5f59;
    --primary-ink: #ffffff;
    --accent: #d97706;
    --accent-light: rgba(217, 119, 6, 0.24);
    --accent-deep: #9a4b08;

    --ink: #172033;
    --ink-600: #526174;
    --ink-400: #7b8796;

    /* ---- 背景 / 表面 ---- */
    --bg: #f6f8fb;
    --paper: #ffffff;
    --paper-alt: #f1f5f4;
    --surface: #ffffff;
    --surface-2: #eaf4f2;
    --line: rgba(23, 32, 51, 0.11);
    --line-strong: rgba(15, 118, 110, 0.3);

    /* ---- 阴影 / 辉光 / 圆角 ---- */
    --shadow: 0 22px 48px -32px rgba(15, 23, 42, 0.34);
    --glow: 0 0 0 1px rgba(15, 118, 110, 0.22), 0 20px 42px -28px rgba(15, 118, 110, 0.38);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 20px;

    /* ---- 字体 ---- */
    --font-display: 'Space Grotesk', 'Noto Sans SC', -apple-system, sans-serif;
    --font-body: 'Public Sans', 'Noto Sans SC', -apple-system, sans-serif;
    --font-mono: 'Space Grotesk', ui-monospace, 'SFMono-Regular', monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-font-smoothing: antialiased; }
html, body { height: 100%; }
body {
    font-family: var(--font-body);
    color: var(--ink); background: var(--bg);
    line-height: 1.65;
}
body::before {
    content: ''; position: fixed; inset: 0; z-index: -2;
    background: linear-gradient(180deg, #fbfcfd 0%, #f4f7f7 58%, #eef3f1 100%);
}
body::after {
    content: none;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-deep); }

.page { max-width: 1180px; margin: 0 auto; padding: 0 1.5rem; }
.d-none-mobile { }

/* ===== Top header (glass) ===== */
.header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--line);
    position: sticky; top: 0;
    background: rgba(251, 252, 253, 0.9);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    z-index: 50;
}
.brand-wrap { display: flex; align-items: baseline; gap: 0.8rem; }
.monogram {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 700; letter-spacing: 0.02em;
    color: var(--ink);
}
.monogram span { color: var(--primary); }
.brand-sub {
    font-size: 0.72rem; letter-spacing: 0.2em; color: var(--accent-deep);
    text-transform: uppercase; font-weight: 600;
}
.nav-tabs-row { display: flex; gap: 0.35rem; align-items: center; }
.nav-tab {
    font-size: 0.9rem; font-weight: 500;
    padding: 0.5rem 1.05rem;
    color: var(--ink-600); cursor: pointer; user-select: none;
    border: 1px solid transparent; border-radius: 999px;
    transition: all 0.18s;
    background: transparent;
    font-family: inherit; line-height: 1.2;
}
.nav-tab:hover { color: var(--primary-dark); background: rgba(15, 118, 110, 0.08); }
.nav-tab.active {
    color: var(--primary-ink); font-weight: 700;
    background: var(--primary);
    border-color: transparent;
    box-shadow: 0 10px 24px -13px rgba(15, 118, 110, 0.8);
}
/* 业务承接:未激活时给一圈淡青描边,突出这个新入口 */
.nav-tab.accent:not(.active) { color: var(--ink); border-color: var(--accent-light); }
.nav-tab.accent:not(.active):hover { border-color: var(--primary); }
@media (max-width: 780px) {
    .header { flex-direction: column; gap: 0.8rem; align-items: flex-start; }
    .nav-tabs-row { width: 100%; flex-wrap: wrap; }
}

/* ===== Tabs ===== */
section.tab-content { padding: 2rem 0 4rem; display: none; }
section.tab-content.active { display: block; animation: fadeIn 0.35s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Landing Hero (course-focused) ===== */
.landing-hero { padding: 2.5rem 0 3rem; }
.hero-grid {
    display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem;
    align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 2rem; } }

.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 0.7rem;
    padding: 0.4rem 1rem; background: rgba(15, 118, 110, 0.07);
    color: var(--primary-dark); border: 1px solid rgba(15, 118, 110, 0.18);
    font-size: 0.75rem; letter-spacing: 0.2em; text-transform: uppercase;
    font-weight: 700; margin-bottom: 1.4rem; border-radius: 999px;
}
.hero-eyebrow::before { content: ''; width: 20px; height: 2px; background: var(--primary); border-radius: 2px; }

.hero-title {
    font-family: var(--font-display);
    font-weight: 700; color: var(--ink);
    font-size: clamp(2.7rem, 6vw, 4.3rem);
    line-height: 1.1; letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
    background: linear-gradient(118deg, #172033 0%, #0f766e 62%, #b45309 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-subtitle {
    display: block; margin-top: 0.6rem;
    font-size: clamp(0.95rem, 1.7vw, 1.15rem);
    letter-spacing: 0.35em; color: var(--accent-deep);
    -webkit-text-fill-color: var(--accent-deep);
    font-weight: 500; font-family: var(--font-display);
}
.hero-lead {
    font-size: clamp(1.02rem, 1.5vw, 1.12rem); color: var(--ink-600);
    line-height: 1.8; margin: 1.8rem 0 2.2rem; max-width: 560px;
}
.hero-ctas { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.btn-hero {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.85rem 1.7rem; font-weight: 600; font-size: 0.96rem;
    border: 1.5px solid transparent; cursor: pointer; transition: all 0.18s;
    font-family: inherit; border-radius: 999px;
}
.btn-hero.primary {
    background: var(--primary);
    color: var(--primary-ink); border-color: transparent;
    box-shadow: 0 14px 30px -15px rgba(15, 118, 110, 0.8);
}
.btn-hero.primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 18px 36px -16px rgba(15, 118, 110, 0.72); }
.btn-hero.outline { background: rgba(255, 255, 255, 0.72); color: var(--ink); border-color: var(--line-strong); }
.btn-hero.outline:hover { background: #ffffff; color: var(--primary-dark); border-color: var(--primary); }

.hero-stats-mini {
    display: flex; gap: 1.8rem; flex-wrap: wrap;
    padding-top: 1.5rem; border-top: 1px solid var(--line);
}
.hero-stats-mini .stat-mini { display: flex; align-items: baseline; gap: 0.4rem; }
.hero-stats-mini b {
    font-family: var(--font-display);
    font-size: 1.75rem; font-weight: 700; color: var(--primary);
}
.hero-stats-mini .stat-mini span { font-size: 0.84rem; color: var(--ink-600); letter-spacing: 0.08em; }

/* Instructor card */
.instructor-card {
    background: linear-gradient(180deg, #ffffff 0%, #f0f7f5 100%);
    border: 1px solid var(--line);
    border-top: 3px solid var(--primary);
    padding: 2.2rem 2rem;
    box-shadow: var(--shadow);
    text-align: center; position: relative;
    border-radius: var(--radius-lg);
}
.instructor-label {
    font-size: 0.7rem; letter-spacing: 0.28em; text-transform: uppercase;
    color: var(--accent-deep); font-weight: 700; margin-bottom: 1.2rem;
}
.instructor-avatar {
    width: 110px; height: 110px; margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--primary-ink);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display);
    font-size: 3.3rem; font-weight: 700;
    border-radius: 50%; border: 4px solid rgba(255, 255, 255, 0.78);
    box-shadow: 0 18px 36px -20px rgba(15, 118, 110, 0.75);
}
.instructor-name {
    font-family: var(--font-display);
    color: var(--ink); font-size: 2rem; font-weight: 700;
    letter-spacing: 0.04em; margin-bottom: 0.3rem;
}
.instructor-title { color: var(--ink-600); font-size: 0.95rem; margin-bottom: 1rem; line-height: 1.6; }
.instructor-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: center; margin-bottom: 1.3rem; }
.instructor-badges span {
    padding: 0.3rem 0.8rem; background: rgba(15, 118, 110, 0.06);
    border: 1px solid var(--line); font-size: 0.78rem;
    color: var(--accent-deep); font-weight: 500; border-radius: 999px;
}
.instructor-quote {
    font-family: var(--font-body);
    font-style: italic; color: var(--ink-600); font-size: 0.92rem;
    line-height: 1.7; padding: 1rem 0;
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    margin-bottom: 1rem;
}
.instructor-link {
    display: inline-flex; align-items: center; gap: 0.4rem;
    color: var(--primary); font-weight: 600; font-size: 0.9rem;
    cursor: pointer; background: transparent; border: 0; font-family: inherit;
}
.instructor-link:hover { color: var(--accent-deep); }

/* Stats (big) */
.stats-full {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1rem; margin: 0 0 3rem;
    padding: 2rem; background: var(--surface);
    border: 1px solid var(--line); border-top: 3px solid var(--primary);
    box-shadow: var(--shadow); border-radius: var(--radius-lg);
}
.stat-full { text-align: center; }
.stat-full .v {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3.5vw, 2.8rem); font-weight: 700;
    color: var(--primary); line-height: 1;
}
.stat-full .v .plus { color: var(--accent); font-size: 0.7em; vertical-align: top; }
.stat-full .l {
    font-size: 0.76rem; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--ink-600); margin-top: 0.5rem; font-weight: 500;
}
@media (max-width: 700px) { .stats-full { grid-template-columns: repeat(2, 1fr); } }

/* Why section */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-bottom: 3rem; }
@media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .features-grid { grid-template-columns: 1fr; } }
.feature-card-v2 {
    background: var(--surface); border: 1px solid var(--line);
    padding: 1.6rem; transition: all 0.2s; border-radius: var(--radius);
}
.feature-card-v2:hover {
    border-color: var(--primary);
    box-shadow: var(--glow);
    transform: translateY(-3px);
}
.feature-card-v2 .ficon {
    width: 48px; height: 48px;
    background: rgba(15, 118, 110, 0.09); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem; margin-bottom: 0.9rem; border-radius: 12px;
}
.feature-card-v2 h4 {
    font-family: var(--font-display);
    color: var(--ink); font-size: 1.18rem;
    margin-bottom: 0.5rem; font-weight: 700;
}
.feature-card-v2 p { color: var(--ink-600); font-size: 0.92rem; line-height: 1.7; }

/* Section labels */
.section-title {
    font-family: var(--font-display);
    font-weight: 700; color: var(--ink);
    font-size: clamp(1.55rem, 3vw, 2.05rem); letter-spacing: 0.01em;
    margin-bottom: 0.2rem;
}
.section-eyebrow {
    font-size: 0.73rem; letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--accent-deep); font-weight: 600; margin-bottom: 0.4rem;
}
.section-line { width: 48px; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); margin-bottom: 1.5rem; border-radius: 3px; }

.grid { display: grid; gap: 1.5rem; margin-bottom: 3rem; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 780px) { .grid { grid-template-columns: 1fr; } }

.card {
    background: var(--surface); border: 1px solid var(--line);
    padding: 2rem; box-shadow: var(--shadow);
    transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
    border-radius: var(--radius);
}
.card:hover { box-shadow: var(--glow); transform: translateY(-2px); border-color: var(--line-strong); }
.card.full { grid-column: 1 / -1; }
.card-title {
    font-family: var(--font-display);
    font-weight: 700; color: var(--ink);
    font-size: 1.28rem; margin-bottom: 0.25rem;
}
.card-eyebrow {
    font-size: 0.7rem; letter-spacing: 0.28em; text-transform: uppercase;
    color: var(--accent-deep); font-weight: 600; margin-bottom: 1rem;
}

/* Module cards */
.module-card {
    background: var(--surface); border: 1px solid var(--line);
    padding: 1.5rem 1.8rem;
    display: flex; align-items: flex-start; gap: 1rem;
    transition: all 0.2s; border-radius: var(--radius);
}
.module-card:hover { box-shadow: var(--glow); border-color: var(--line-strong); transform: translateY(-2px); }
.module-num {
    font-family: var(--font-display); font-weight: 700;
    color: var(--primary); font-size: 2rem; line-height: 1;
    flex-shrink: 0; min-width: 56px;
}
.module-info h4 { font-family: var(--font-display); color: var(--ink); font-size: 1.18rem; margin-bottom: 0.25rem; font-weight: 700; }
.module-info .meta {
    font-size: 0.8rem; color: var(--accent-deep); letter-spacing: 0.14em;
    text-transform: uppercase; margin-bottom: 0.6rem;
}
.module-info p { color: var(--ink-600); font-size: 0.92rem; }

/* Path cards */
.path-card {
    background: var(--paper-alt); border: 1px solid var(--line);
    padding: 1.4rem 1.6rem; transition: all 0.2s; border-radius: var(--radius);
}
.path-card:hover { background: var(--surface-2); border-color: var(--primary); transform: translateY(-2px); }
.path-card .badge {
    display: inline-block; padding: 0.24rem 0.7rem;
    background: var(--primary); color: var(--primary-ink);
    font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase;
    margin-bottom: 0.6rem; border-radius: 999px; font-weight: 700;
}
.path-card h5 { color: var(--ink); font-size: 1.05rem; margin-bottom: 0.4rem; font-weight: 700; }
.path-card .units {
    font-family: var(--font-mono); color: var(--accent-deep);
    font-size: 0.86rem; margin-bottom: 0.5rem; letter-spacing: 0.03em;
}
.path-card .desc { font-size: 0.88rem; color: var(--ink-600); }

/* Outline accordion */
.module-section {
    background: var(--surface); border: 1px solid var(--line);
    margin-bottom: 1rem; border-radius: var(--radius); overflow: hidden;
}
.module-section > summary {
    padding: 1.15rem 1.6rem; cursor: pointer;
    display: flex; align-items: center; justify-content: space-between;
    list-style: none;
    font-family: var(--font-display);
    font-weight: 700; color: var(--ink); font-size: 1.12rem;
    user-select: none;
}
.module-section > summary::-webkit-details-marker { display: none; }
.module-section > summary .toggle { color: var(--primary); transition: transform 0.2s; font-size: 1.1rem; }
.module-section[open] > summary .toggle { transform: rotate(180deg); }
.module-section[open] > summary { border-bottom: 1px solid var(--line); background: rgba(15, 118, 110, 0.045); }
.module-section .module-body { padding: 1rem 1.6rem 1.6rem; }
.module-section .module-intro {
    color: var(--ink-600); font-size: 0.92rem; margin-bottom: 1rem;
    font-style: italic; padding-left: 0.8rem; border-left: 3px solid var(--primary);
}
.unit-row {
    display: grid; grid-template-columns: 56px 1fr;
    gap: 1rem; padding: 1rem 0;
    border-bottom: 1px dashed var(--line);
}
.unit-row:last-child { border-bottom: none; }
.unit-num {
    font-family: var(--font-mono); font-weight: 700;
    color: var(--primary); font-size: 1.1rem;
    text-align: right; padding-top: 2px;
}
.unit-content h6 {
    font-family: var(--font-body);
    color: var(--ink); font-size: 1rem; font-weight: 700;
    margin-bottom: 0.3rem;
}
.unit-content p { color: var(--ink-600); font-size: 0.9rem; line-height: 1.7; margin-bottom: 0.4rem; }
.unit-content .deliverable {
    display: inline-block; padding: 0.22rem 0.65rem;
    background: rgba(15, 118, 110, 0.07); border: 1px solid rgba(15, 118, 110, 0.16);
    font-size: 0.78rem; color: var(--primary-dark); font-weight: 600; border-radius: 6px;
}
.unit-content .deliverable::before { content: '▶ '; color: var(--primary); }

/* Read-only protection */
.protected { user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; position: relative; }
.protected * { user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; }
.protected img { -webkit-user-drag: none; user-drag: none; pointer-events: none; }
.protected::after {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background-image: linear-gradient(135deg, transparent 0%, transparent 49%, rgba(15, 118, 110, 0.025) 50%, transparent 51%, transparent 100%);
    background-size: 200px 200px;
}
.protect-banner {
    background: rgba(217, 119, 6, 0.07); border: 1px dashed rgba(217, 119, 6, 0.55);
    padding: 0.8rem 1.2rem; margin-bottom: 1.5rem;
    color: var(--accent-deep); font-size: 0.88rem;
    display: flex; align-items: center; gap: 0.6rem; border-radius: var(--radius-sm);
}
.protect-banner i { color: var(--primary); font-size: 1.1rem; }
.toast-protected {
    position: fixed; bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #172033; color: #ffffff;
    border: 1px solid var(--line-strong);
    padding: 0.8rem 1.4rem; font-size: 0.9rem; border-radius: 999px;
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.28);
    opacity: 0; transition: all 0.25s; pointer-events: none; z-index: 100;
}
.toast-protected.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media print { .protected { display: none; } }

/* Contact */
.contact-section {
    background: linear-gradient(135deg, #e7f2ef 0%, #f8f4ea 100%);
    color: var(--ink);
    padding: 3rem 2rem; margin: 3rem 0 0;
    position: relative; overflow: hidden;
    border: 1px solid var(--line); border-radius: var(--radius-lg);
}
.contact-section::before {
    content: ''; position: absolute; top: 0; right: 0; width: 55%; height: 100%;
    background: none;
    pointer-events: none;
}
.contact-section .section-title { color: var(--ink); position: relative; }
.contact-section .section-eyebrow { color: var(--accent-deep); position: relative; }
.contact-section .section-line { background: linear-gradient(90deg, var(--primary), var(--accent)); }
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.5rem; position: relative; }
@media (max-width: 600px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-item {
    display: flex; align-items: center; gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--line);
    color: var(--ink); transition: all 0.2s; border-radius: var(--radius);
}
.contact-item:hover {
    background: #ffffff;
    border-color: var(--primary); transform: translateY(-2px);
}
.contact-icon {
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: var(--primary-ink);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; flex-shrink: 0;
}
.contact-item:hover .contact-icon { box-shadow: 0 0 22px -4px var(--primary); }
.contact-label { font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--ink-400); margin-bottom: 2px; }
.contact-value { font-size: 1.05rem; font-weight: 600; word-break: break-all; letter-spacing: 0.02em; color: var(--ink); }

/* About tab hero */
.about-hero { text-align: center; padding: 1.5rem 0 2rem; }
.name-big {
    font-family: var(--font-display);
    font-weight: 700; font-size: clamp(3.4rem, 8vw, 5.6rem);
    line-height: 1; color: var(--ink); letter-spacing: 0.04em;
    margin-bottom: 0.4rem;
    background: linear-gradient(118deg, #172033 0%, #0f766e 62%, #b45309 100%);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.name-en {
    font-family: var(--font-mono);
    font-size: clamp(0.9rem, 1.7vw, 1.05rem);
    letter-spacing: 0.5em; color: var(--accent-deep);
    margin-left: 0.5em; margin-bottom: 1.4rem;
}
.divider { width: 60px; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); margin: 0 auto 1.3rem; border-radius: 3px; }
.position-line {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.7vw, 1.15rem);
    color: var(--ink-600); letter-spacing: 0.04em;
}
.position-line strong { color: var(--ink); font-weight: 700; }

.tag-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.tag {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.55rem 1rem; background: rgba(15, 118, 110, 0.055);
    border: 1px solid var(--line); color: var(--ink);
    font-size: 0.92rem; font-weight: 500; letter-spacing: 0.02em;
    transition: all 0.2s; border-radius: 999px;
}
.tag:hover { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.tag i { color: var(--primary); }
.tag:hover i { color: var(--primary-ink); }

.bullet-list { list-style: none; padding: 0; }
.bullet-list li {
    position: relative; padding-left: 1.5rem; margin-bottom: 0.85rem;
    font-size: 0.96rem; line-height: 1.7; color: var(--ink-600);
}
.bullet-list li::before {
    content: ''; position: absolute; left: 0; top: 0.6em;
    width: 8px; height: 8px; background: var(--primary);
    transform: rotate(45deg); border-radius: 1px;
}
.bullet-list strong { color: var(--ink); font-weight: 700; }

/* Demo cases */
.demo-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-bottom: 2rem; }
.demo-card {
    background: var(--surface); border: 1px solid var(--line);
    border-top: 3px solid var(--primary);
    padding: 2rem 1.5rem; text-align: center;
    transition: all 0.2s; border-radius: var(--radius);
}
.demo-card:hover { box-shadow: var(--glow); transform: translateY(-3px); border-top-color: var(--accent); }
.demo-card .demo-icon {
    width: 56px; height: 56px; margin: 0 auto 1rem;
    background: rgba(15, 118, 110, 0.09); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem; color: var(--primary);
}
.demo-card h5 { color: var(--ink); margin-bottom: 0.4rem; font-weight: 700; }
.demo-card .desc { color: var(--ink-600); font-size: 0.88rem; }
.demo-card .pending {
    display: inline-block; padding: 0.22rem 0.7rem;
    background: rgba(217, 119, 6, 0.09); color: var(--accent-deep);
    font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
    margin-top: 0.8rem; border-radius: 999px;
}

/* =========================================================================
   业务承接 (Professional Services) —— 新增板块
   ========================================================================= */
.svc-hero { text-align: center; padding: 2rem 0 2.5rem; max-width: 840px; margin: 0 auto; }
.svc-hero-title {
    font-family: var(--font-display); font-weight: 700;
    font-size: clamp(2.3rem, 5.5vw, 3.7rem); line-height: 1.1;
    margin: 0.5rem 0 1.1rem; letter-spacing: -0.01em;
    background: linear-gradient(118deg, #172033 0%, #0f766e 62%, #b45309 100%);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.svc-hero-lead { color: var(--ink-600); font-size: clamp(1rem, 1.6vw, 1.12rem); line-height: 1.85; }
.svc-hero-lead b { color: var(--ink); font-weight: 700; }
.svc-hero-ctas { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; margin-top: 1.9rem; }

/* two pillars */
.svc-pillars { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 1rem 0 3.5rem; }
@media (max-width: 900px) { .svc-pillars { grid-template-columns: 1fr; } }
.svc-pillar {
    background: linear-gradient(180deg, #ffffff 0%, #f2f7f5 100%);
    border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 1.9rem; position: relative; overflow: hidden;
    box-shadow: var(--shadow);
}
.svc-pillar::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}
.svc-pillar-head { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.8rem; }
.svc-pillar-icon {
    width: 58px; height: 58px; border-radius: 15px;
    background: rgba(15, 118, 110, 0.09); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.7rem; flex-shrink: 0; box-shadow: inset 0 0 0 1px var(--line);
}
.svc-pillar-kicker { font-size: 0.7rem; letter-spacing: 0.26em; text-transform: uppercase; color: var(--accent-deep); font-weight: 700; margin-bottom: 0.15rem; }
.svc-pillar-head h3 { font-family: var(--font-display); color: var(--ink); font-size: 1.55rem; font-weight: 700; }
.svc-pillar-desc { color: var(--ink-600); font-size: 0.95rem; margin-bottom: 1.4rem; line-height: 1.7; }
.svc-items { display: flex; flex-direction: column; gap: 0.9rem; }
.svc-item {
    background: rgba(255, 255, 255, 0.72); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 1.15rem 1.3rem; transition: all 0.2s;
}
.svc-item:hover { border-color: var(--primary); background: #ffffff; transform: translateX(4px); }
.svc-item h5 {
    color: var(--ink); font-size: 1.06rem; font-weight: 700;
    margin-bottom: 0.4rem; display: flex; align-items: center; gap: 0.5rem;
}
.svc-item h5 i { color: var(--primary); font-size: 1.15rem; }
.svc-item p { color: var(--ink-600); font-size: 0.9rem; line-height: 1.7; margin-bottom: 0.7rem; }
.svc-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.svc-tags span {
    font-size: 0.74rem; padding: 0.22rem 0.62rem;
    background: rgba(217, 119, 6, 0.07); border: 1px solid rgba(217, 119, 6, 0.16);
    color: var(--accent-deep); border-radius: 999px; letter-spacing: 0.02em;
}

/* trust / why choose */
.svc-trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.1rem; margin-bottom: 3.5rem; }
@media (max-width: 900px) { .svc-trust-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .svc-trust-grid { grid-template-columns: 1fr; } }
.svc-trust {
    background: var(--surface); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 1.5rem; transition: all 0.2s;
}
.svc-trust:hover { border-color: var(--primary); box-shadow: var(--glow); transform: translateY(-3px); }
.svc-trust .ti {
    width: 44px; height: 44px; border-radius: 12px;
    background: rgba(15, 118, 110, 0.09); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; margin-bottom: 0.8rem;
}
.svc-trust h5 { color: var(--ink); font-size: 1.02rem; margin-bottom: 0.4rem; font-weight: 700; }
.svc-trust p { color: var(--ink-600); font-size: 0.86rem; line-height: 1.65; }

/* process steps */
.svc-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.8rem; margin-bottom: 1rem; }
@media (max-width: 820px) { .svc-steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .svc-steps { grid-template-columns: 1fr; } }
.svc-step {
    background: var(--paper-alt); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 1.3rem 1.15rem; position: relative;
    transition: all 0.2s;
}
.svc-step:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.svc-step .n { font-family: var(--font-mono); font-size: 1.55rem; font-weight: 700; color: var(--primary); line-height: 1; }
.svc-step h6 { color: var(--ink); font-size: 0.98rem; margin: 0.55rem 0 0.3rem; font-weight: 700; }
.svc-step p { color: var(--ink-400); font-size: 0.8rem; line-height: 1.6; }

/* Footer */
.foot {
    padding: 2rem 0; display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 1rem;
    font-size: 0.82rem; color: var(--ink-400);
    border-top: 1px solid var(--line);
}
.foot .copyright { color: var(--ink-600); font-weight: 500; letter-spacing: 0.06em; }
.foot a { color: var(--primary); font-weight: 500; }
.foot a:hover { color: var(--accent-deep); }