/* ============================================================
   2026 国家网络安全宣传周 · 日照职业技术大学
   design tokens & global
   ============================================================ */
:root {
    --brand-1: #0349FF;
    --brand-2: #2AB2FD;
    --brand-3: #1883FE;
    --brand-soft: #EAF3FF;
    --accent: #FFD400;
    --accent-2: #FF7A00;

    --ink-1: #0F1A2E;
    --ink-2: #1E293B;
    --ink-3: #334155;
    --ink-4: #64748B;
    --ink-5: #94A3B8;
    --line: #E2E8F0;
    --line-soft: #EEF2F7;

    --bg: #ffffff;
    --bg-soft: #F6F8FC;
    --bg-deep: #0B1437;

    --shadow-sm: 0 2px 6px rgba(15, 26, 46, 0.04);
    --shadow-md: 0 6px 24px rgba(15, 26, 46, 0.06), 0 1px 3px rgba(15, 26, 46, 0.04);
    --shadow-lg: 0 20px 60px rgba(15, 26, 46, 0.10), 0 2px 6px rgba(15, 26, 46, 0.04);
    --shadow-blue: 0 10px 30px rgba(24, 131, 254, 0.20);

    --r-sm: 8px;
    --r-md: 14px;
    --r-lg: 22px;
    --r-xl: 32px;

    --container: 1200px;

    --ease: cubic-bezier(.2, .8, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--ink-2);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--brand-3); }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ol, ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; color: var(--ink-1); letter-spacing: -0.01em; line-height: 1.3; }
p { margin: 0; }
strong { color: var(--ink-1); font-weight: 700; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.navbar.is-scrolled {
    border-bottom-color: var(--line);
    box-shadow: var(--shadow-sm);
    background: rgba(255, 255, 255, 0.92);
}
.nav-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 72px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--ink-1);
}
.brand-img {
    height: 40px;
    width: auto;
    display: block;
    flex: 0 0 auto;
    transition: transform .25s var(--ease);
}
.brand:hover .brand-img { transform: scale(1.04); }
.brand:hover { color: var(--ink-1); }
.brand-text { line-height: 1.18; }
.brand-name { display: block; font-weight: 700; font-size: 15px; letter-spacing: 0.01em; }
.brand-sub { display: block; font-size: 11.5px; color: var(--ink-4); margin-top: 1px; }

.nav-links {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-links a {
    font-size: 14px;
    color: var(--ink-3);
    padding: 8px 12px;
    border-radius: 999px;
    transition: background .2s var(--ease), color .2s var(--ease);
}
.nav-links a:hover {
    color: var(--brand-3);
    background: var(--brand-soft);
}
.nav-links a.is-active {
    color: var(--brand-3);
    background: var(--brand-soft);
}
.nav-links .nav-external {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    padding: 8px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink-2);
    font-weight: 600;
}
.nav-links .nav-external svg { width: 14px; height: 14px; }
.nav-links .nav-external:hover {
    border-color: var(--brand-3);
    color: var(--brand-3);
    background: var(--brand-soft);
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    flex-direction: column;
    gap: 5px;
    align-items: center;
    justify-content: center;
    background: var(--bg-soft);
}
.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--ink-2);
    border-radius: 2px;
    transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 48px;
    padding: 0 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    transition: transform .2s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
    cursor: pointer;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary {
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    color: #fff;
    box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(24, 131, 254, 0.30);
}
.btn-ghost {
    color: var(--ink-1);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--line);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    color: var(--brand-3);
    border-color: var(--brand-3);
    background: #fff;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    padding: 110px 0 0;
    background: radial-gradient(120% 80% at 20% 0%, #1a4dff 0%, #0a2bcc 55%, #061a82 100%);
    isolation: isolate;
}
.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}
.hero-grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(120% 80% at 50% 0%, #000 50%, transparent 100%);
    -webkit-mask-image: radial-gradient(120% 80% at 50% 0%, #000 50%, transparent 100%);
}
.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.45;
}
.hero-blob-1 {
    width: 520px; height: 520px;
    background: linear-gradient(135deg, #2AB2FD, #6F8BFF);
    top: -200px; right: -120px;
}
.hero-blob-2 {
    width: 420px; height: 420px;
    background: linear-gradient(135deg, #00E0FF, #1883FE);
    bottom: 0; left: -120px;
    opacity: 0.35;
}

.hero-inner {
    text-align: center;
    padding-bottom: 88px;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.85);
    font-size: 13.5px;
    letter-spacing: 0.02em;
    backdrop-filter: blur(8px);
}
.hero-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.25);
    animation: pulse 1.8s var(--ease) infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: .6; }
}

.hero-title {
    margin: 28px auto 22px;
    font-size: clamp(40px, 5.8vw, 68px);
    font-weight: 800;
    line-height: 1.1;
    color: #fff;
    letter-spacing: -0.02em;
}
.hero-title-accent {
    background: linear-gradient(135deg, #6EE7FF 0%, #FFD400 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-theme-tag {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
    color: rgba(255,255,255,0.9);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
}
.hero-theme-tag-line {
    width: 28px; height: 1px;
    background: rgba(255,255,255,0.4);
}

.hero-subtitle {
    font-size: clamp(15px, 1.4vw, 18px);
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 36px;
}

.hero-meta {
    display: inline-flex;
    align-items: stretch;
    gap: 0;
    padding: 16px 8px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 18px;
    backdrop-filter: blur(8px);
    flex-wrap: wrap;
    justify-content: center;
}
.hero-meta-item { display: flex; flex-direction: column; align-items: flex-start; padding: 0 24px; line-height: 1.3; }
.hero-meta-label { font-size: 11px; color: rgba(255,255,255,0.55); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 6px; }
.hero-meta-value { font-size: 14px; color: #fff; font-weight: 600; line-height: 1.45; }
.hero-meta-divider { width: 1px; background: rgba(255,255,255,0.16); margin: 4px 0; }

.hero-actions {
    margin-top: 36px;
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    max-width: 980px;
    margin: 0 auto;
    padding: 30px 24px;
    background: rgba(255, 255, 255, 0.06);
    border-top: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(10px);
}
.hero-stat { text-align: center; }
.hero-stat-num {
    font-size: clamp(30px, 3.2vw, 44px);
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, #6EE7FF, #FFD400);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.1;
}
.hero-stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    margin-top: 4px;
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 104px 0; position: relative; }
.section-light { background: var(--bg); }
.section-soft {
    background: linear-gradient(180deg, var(--bg-soft) 0%, #f0f5fc 100%);
    position: relative;
}
.section-soft::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(24, 131, 254, 0.18), transparent);
}
.section-dark {
    background: linear-gradient(180deg, #0B1437 0%, #0A1A4D 100%);
    color: rgba(255,255,255,0.85);
}
.section-dark .section-title { color: #fff; }
.section-dark .section-lead { color: rgba(255,255,255,0.7); }
.section-dark .threat-card { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.10); }
.section-dark .threat-card h3 { color: #fff; }
.section-dark .threat-card p { color: rgba(255,255,255,0.7); }
.section-dark .threat-key li { color: rgba(255,255,255,0.7); }
.section-dark .threat-tag { background: rgba(255,255,255,0.10); color: rgba(255,255,255,0.9); }

.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 60px;
}
.section-head-light .section-title { color: #fff; }
.section-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand-3);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.section-dark .section-eyebrow {
    background: rgba(110, 231, 255, 0.12);
    color: #6EE7FF;
}
.section-title {
    margin-top: 16px;
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 700;
    color: var(--ink-1);
    letter-spacing: -0.01em;
}
.section-lead {
    margin-top: 16px;
    color: var(--ink-4);
    font-size: 16px;
}

/* ============================================================
   Timeline (六大主题日)
   ============================================================ */
.timeline {
    position: relative;
    padding: 8px 0 0;
    max-width: 980px;
    margin: 0 auto;
    counter-reset: t;
}
.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 12px; bottom: 12px;
    width: 2px;
    background: linear-gradient(180deg, var(--brand-1), var(--brand-2));
    opacity: 0.3;
    transform: translateX(-50%);
}
.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 64px 1fr;
    gap: 0;
    margin-bottom: 22px;
    align-items: stretch;
}
.timeline-item:nth-child(odd) .timeline-card { grid-column: 3; grid-row: 1; }
.timeline-item:nth-child(odd) .timeline-date { grid-column: 1; grid-row: 1; justify-self: end; text-align: right; }
.timeline-item:nth-child(odd) .timeline-dot { grid-column: 2; grid-row: 1; }
.timeline-item:nth-child(even) .timeline-card { grid-column: 1; grid-row: 1; }
.timeline-item:nth-child(even) .timeline-date { grid-column: 3; grid-row: 1; }
.timeline-item:nth-child(even) .timeline-dot { grid-column: 2; grid-row: 1; }

.timeline-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 22px;
    min-width: 140px;
}
.timeline-date-day {
    font-size: 40px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    font-feature-settings: "tnum";
}
.timeline-date-month {
    font-size: 12px;
    color: var(--ink-4);
    margin-top: 4px;
    letter-spacing: 0.1em;
}

.timeline-dot {
    position: relative;
    width: 64px;
    display: grid;
    place-items: center;
}
.timeline-dot::before {
    content: "";
    width: 16px; height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    box-shadow: 0 0 0 6px rgba(24, 131, 254, 0.12);
}
.timeline-dot::after {
    counter-increment: t;
    content: counter(t, decimal-leading-zero);
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.timeline-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 22px 24px;
    margin: 0 24px;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    position: relative;
}
.timeline-card::before {
    content: "";
    position: absolute;
    top: 50%; transform: translateY(-50%);
    width: 18px; height: 1px;
    background: var(--line);
}
.timeline-item:nth-child(odd) .timeline-card::before { right: -19px; }
.timeline-item:nth-child(even) .timeline-card::before { left: -19px; }
.timeline-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(24, 131, 254, 0.4);
}
.timeline-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand-3);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}
.timeline-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}
.timeline-card p {
    font-size: 14px;
    color: var(--ink-3);
    line-height: 1.7;
}

/* ============================================================
   Activity grid (校园活动安排)
   ============================================================ */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.activity-card {
    position: relative;
    padding: 28px 26px 26px;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    overflow: hidden;
}
.activity-card::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 3px;
    background: linear-gradient(180deg, var(--c1), var(--c2));
    opacity: 0;
    transition: opacity .25s var(--ease);
}
.activity-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(24, 131, 254, 0.4);
}
.activity-card:hover::before { opacity: 1; }
.activity-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    color: #fff;
    display: grid;
    place-items: center;
    margin-bottom: 18px;
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}
.activity-icon svg { width: 24px; height: 24px; }
.activity-card h3 {
    font-size: 17px;
    color: var(--ink-1);
    margin-bottom: 10px;
    padding-right: 40px;
}
.activity-card p {
    color: var(--ink-3);
    font-size: 14px;
}
.activity-num {
    position: absolute;
    top: 22px;
    right: 22px;
    font-size: 28px;
    font-weight: 800;
    font-feature-settings: "tnum";
    color: transparent;
    -webkit-text-stroke: 1.5px var(--ink-5);
    line-height: 1;
    transition: color .25s var(--ease), -webkit-text-stroke-color .25s var(--ease);
}
.activity-card:hover .activity-num {
    -webkit-text-stroke-color: var(--brand-3);
    color: rgba(24, 131, 254, 0.06);
}
.activity-card-wide { grid-column: span 3; }

/* ============================================================
   七进活动（campaign-row）
   ============================================================ */
.campaign-row {
    margin-top: 32px;
    padding: 36px 40px;
    background: linear-gradient(135deg, #fff 0%, #f7faff 100%);
    border: 1px solid var(--line);
    border-radius: var(--r-xl);
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 36px;
    align-items: center;
    box-shadow: var(--shadow-sm);
}
.campaign-text .section-eyebrow { margin-bottom: 12px; }
.campaign-text h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--ink-1);
}
.campaign-text p {
    color: var(--ink-3);
    font-size: 14px;
}
.campaign-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.chip {
    padding: 10px 18px;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--line);
    color: var(--ink-2);
    font-size: 14px;
    font-weight: 500;
    transition: all .25s var(--ease);
    box-shadow: var(--shadow-sm);
}
.chip:hover {
    border-color: var(--brand-3);
    color: var(--brand-3);
    background: var(--brand-soft);
    transform: translateY(-2px);
}

/* ============================================================
   法律法规（law-grid）
   ============================================================ */
.law-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.law-card {
    position: relative;
    padding: 32px 28px 28px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    overflow: hidden;
}
.law-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c1), var(--c2));
}
.law-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.law-year {
    position: absolute;
    top: 22px;
    right: 22px;
    font-size: 13px;
    font-weight: 700;
    color: var(--ink-5);
    letter-spacing: 0.05em;
    font-feature-settings: "tnum";
    background: var(--bg-soft);
    padding: 4px 10px;
    border-radius: 999px;
}
.law-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    color: #fff;
    display: grid;
    place-items: center;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.law-icon svg { width: 26px; height: 26px; }
.law-card h3 {
    font-size: 22px;
    margin-bottom: 4px;
}
.law-sub {
    font-size: 13px;
    color: var(--ink-4);
    margin-bottom: 14px;
    letter-spacing: 0.02em;
}
.law-card p {
    color: var(--ink-3);
    font-size: 14px;
    line-height: 1.75;
}

.law-focus {
    margin-top: 32px;
    padding: 22px 28px;
    background: linear-gradient(135deg, rgba(24,131,254,0.06), rgba(42,178,253,0.06));
    border: 1px solid rgba(24, 131, 254, 0.15);
    border-radius: var(--r-lg);
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}
.law-focus-label {
    font-weight: 700;
    color: var(--brand-3);
    font-size: 14px;
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.law-focus-items {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.law-focus-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background: #fff;
    border-radius: 999px;
    font-size: 13.5px;
    color: var(--ink-2);
    box-shadow: var(--shadow-sm);
}
.law-focus-pill .dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
}

/* ============================================================
   威胁卡片
   ============================================================ */
.threat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.threat-card {
    position: relative;
    padding: 28px 24px 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    overflow: hidden;
}
.threat-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--c1), var(--c2));
    opacity: 0;
    transition: opacity .25s var(--ease);
}
.threat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.threat-card:hover::before { opacity: 1; }
.threat-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    color: #fff;
    display: grid;
    place-items: center;
    margin-bottom: 18px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.threat-icon svg { width: 26px; height: 26px; }
.threat-tag {
    position: absolute;
    top: 18px; right: 18px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-soft);
    color: var(--ink-4);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
}
.threat-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--ink-1);
}
.threat-card p {
    font-size: 13.5px;
    color: var(--ink-3);
}
.threat-key {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--line);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.threat-key li {
    position: relative;
    padding-left: 18px;
    font-size: 13px;
    color: var(--ink-3);
}
.threat-key li::before {
    content: "";
    position: absolute;
    left: 0; top: 8px;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c1), var(--c2));
}

/* ============================================================
   100 条知识
   ============================================================ */
.tips-tabs {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 8px;
    padding: 8px;
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    margin-bottom: 24px;
}
.tips-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 12px 6px;
    border-radius: var(--r-md);
    color: var(--ink-3);
    font-size: 13px;
    font-weight: 500;
    transition: all .25s var(--ease);
    white-space: nowrap;
}
.tips-tab:hover { color: var(--brand-3); background: rgba(24, 131, 254, 0.06); }
.tips-tab.is-active {
    color: #fff;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    box-shadow: var(--shadow-blue);
}
.tips-tab-num {
    font-size: 10.5px;
    font-weight: 700;
    letter-spacing: 0.08em;
    opacity: 0.7;
}
.tips-tab.is-active .tips-tab-num { opacity: 0.9; }

.tips-panels {
    position: relative;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--r-xl);
    padding: 36px 40px;
    box-shadow: var(--shadow-sm);
    min-height: 380px;
}
.tips-panel {
    display: none;
    animation: fadeUp .35s var(--ease) both;
}
.tips-panel.is-active { display: block; }
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.tips-panel-head {
    display: flex;
    align-items: center;
    gap: 18px;
    padding-bottom: 22px;
    margin-bottom: 22px;
    border-bottom: 1px solid var(--line);
}
.tips-panel-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    color: #fff;
    display: grid;
    place-items: center;
    box-shadow: var(--shadow-md);
    flex: 0 0 56px;
}
.tips-panel-icon svg { width: 28px; height: 28px; }
.tips-panel-head h3 {
    font-size: 22px;
    color: var(--ink-1);
}
.tips-panel-head p {
    color: var(--ink-4);
    font-size: 14px;
    margin-top: 4px;
}

.tips-list {
    counter-reset: tip;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 28px;
}
.tips-list li {
    counter-increment: tip;
    position: relative;
    padding: 14px 14px 14px 54px;
    background: var(--bg-soft);
    border-radius: var(--r-md);
    font-size: 14px;
    color: var(--ink-2);
    line-height: 1.65;
    transition: background .2s var(--ease), transform .2s var(--ease);
}
.tips-list li::before {
    content: counter(tip, decimal-leading-zero);
    position: absolute;
    left: 14px; top: 14px;
    font-size: 16px;
    font-weight: 800;
    font-feature-settings: "tnum";
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.tips-list li:hover {
    background: var(--brand-soft);
    transform: translateX(2px);
}

/* ============================================================
   工作要求 (work-grid) + 邮箱反馈卡片 (mail-card)
   ============================================================ */
.work-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}
.work-card {
    position: relative;
    padding: 28px 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.work-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(24, 131, 254, 0.35);
}
.work-num {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: 14px;
    font-feature-settings: "tnum";
}
.work-card h3 {
    font-size: 18px;
    color: var(--ink-1);
    margin-bottom: 10px;
}
.work-card p {
    color: var(--ink-3);
    font-size: 14px;
    line-height: 1.75;
}

.mail-card {
    margin-top: 28px;
    display: flex;
    align-items: center;
    gap: 22px;
    padding: 26px 30px;
    background: linear-gradient(135deg, #0349FF 0%, #2AB2FD 100%);
    color: #fff;
    border-radius: var(--r-lg);
    box-shadow: 0 14px 40px rgba(24, 131, 254, 0.18), 0 2px 6px rgba(15,26,46,0.04);
    position: relative;
    overflow: hidden;
}
.mail-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 90% -20%, rgba(255,255,255,0.18), transparent 40%),
        radial-gradient(circle at 0% 120%, rgba(255,255,255,0.12), transparent 50%);
    pointer-events: none;
}
.mail-card > * { position: relative; z-index: 1; }
.mail-card-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: rgba(255,255,255,0.18);
    color: #fff;
    display: grid;
    place-items: center;
    flex: 0 0 56px;
}
.mail-card-icon svg { width: 28px; height: 28px; }
.mail-card-body { flex: 1; min-width: 0; }
.mail-card-eyebrow {
    font-size: 12px;
    opacity: 0.85;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 4px;
}
.mail-card-addr {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.01em;
    word-break: break-all;
}
.mail-card-tip {
    font-size: 13px;
    opacity: 0.85;
    margin-top: 4px;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--bg-deep);
    color: rgba(255,255,255,0.7);
    padding: 72px 0 0;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 56px;
    padding-bottom: 48px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    color: #fff;
    margin-bottom: 20px;
}
.footer-brand-img {
    height: 48px;
    width: auto;
    padding: 6px 12px;
    border-radius: 8px;
    flex: 0 0 auto;
}
.footer-brand-name { font-size: 16px; font-weight: 700; color: #fff; }
.footer-brand-sub { font-size: 12.5px; color: rgba(255,255,255,0.55); margin-top: 3px; }
.footer-tip { font-size: 14px; line-height: 1.8; max-width: 460px; margin-bottom: 20px; }

.footer-school-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.04);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    transition: all .25s var(--ease);
}
.footer-school-link svg { width: 16px; height: 16px; }
.footer-school-link:hover {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border-color: rgba(255,255,255,0.3);
}

.footer-right { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 14px; font-weight: 600; }
.footer-col a, .footer-col p {
    display: block;
    color: rgba(255,255,255,0.65);
    font-size: 13.5px;
    margin-bottom: 8px;
    line-height: 1.6;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 22px 0;
    font-size: 12.5px;
    color: rgba(255,255,255,0.5);
}
.footer-bottom .container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    justify-content: center;
}
.footer-divider { color: rgba(255,255,255,0.3); }
.footer-bottom a:hover { color: #fff; }

/* ============================================================
   Back to top
   ============================================================ */
.back-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    z-index: 90;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    color: #fff;
    display: grid;
    place-items: center;
    box-shadow: var(--shadow-blue);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease);
}
.back-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-top:hover { transform: translateY(-3px); }
.back-top svg { width: 22px; height: 22px; }

/* ============================================================
   Reveal animation
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity .6s var(--ease), transform .6s var(--ease);
        will-change: opacity, transform;
    }
    .reveal.is-in { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
    .threat-grid { grid-template-columns: repeat(3, 1fr); }
    .tips-tabs { grid-template-columns: repeat(5, 1fr); }
    .law-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 960px) {
    .work-grid { grid-template-columns: 1fr; }
    .campaign-row { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 56px 1fr; }
    .timeline-item:nth-child(odd) .timeline-card,
    .timeline-item:nth-child(even) .timeline-card { grid-column: 2; }
    .timeline-item:nth-child(odd) .timeline-date,
    .timeline-item:nth-child(even) .timeline-date { display: none; }
    .timeline::before { left: 28px; }
    .timeline-dot { grid-column: 1 !important; }
    .timeline-dot::after { font-size: 9px; }
    .timeline-item .timeline-card { margin: 0 0 0 16px; }
    .timeline-item .timeline-card::before { display: none; }
    .footer-inner { grid-template-columns: 1fr; gap: 36px; }
    .footer-right { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
    .section { padding: 80px 0; }
    .activity-grid { grid-template-columns: repeat(2, 1fr); }
    .activity-card-wide { grid-column: span 2; }
    .threat-grid { grid-template-columns: repeat(2, 1fr); }
    .law-grid { grid-template-columns: 1fr; }
    .tips-tabs { grid-template-columns: repeat(5, 1fr); }
    .tips-list { grid-template-columns: 1fr; }
    .tips-panels { padding: 26px 22px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); padding: 22px 18px; }
}
@media (max-width: 720px) {
    .nav-links {
        position: absolute;
        top: 72px; left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 16px;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow-md);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease);
    }
    .nav-links.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .nav-links a { padding: 12px 14px; border-radius: var(--r-md); }
    .nav-links .nav-external { margin-left: 0; }
    .nav-toggle { display: flex; }

    .hero { padding-top: 72px; }
    .hero-inner { padding-bottom: 64px; }
    .hero-meta { padding: 14px 4px; gap: 0; }
    .hero-meta-item { padding: 0 14px; }
    .hero-meta-divider { display: none; }

    .activity-grid { grid-template-columns: 1fr; }
    .activity-card-wide { grid-column: span 1; }
    .threat-grid { grid-template-columns: 1fr; }
    .tips-tabs { grid-template-columns: repeat(2, 1fr); }
    .footer-right { grid-template-columns: 1fr; }
    .footer-bottom .container { flex-direction: column; text-align: center; }

    .mail-card { flex-direction: column; text-align: center; }
}