/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    /* 国内系统字体优先，无外部依赖 */
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
                 "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #0f172a;
    background-color: #f8fafc;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== 主题色变量 ===== */
:root {
    --primary: #1e3a5f;
    --primary-dark: #142a47;
    --secondary: #0d9488;
    --secondary-light: #14b8a6;
    --accent: #f97316;
    --accent-dark: #ea580c;
    --light: #f8fafc;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --dark: #0f172a;
    --green-500: #22c55e;
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) { .container { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .container { padding: 0 2rem; } }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(30, 58, 95, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 95, 0.35);
}

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-accent {
    background: var(--accent);
    color: white;
}

.btn-accent:hover {
    background: var(--accent-dark);
}

.btn-lg { padding: 1rem 2rem; font-size: 1.125rem; }
.btn-sm { padding: 0.625rem 1.25rem; font-size: 0.875rem; }
.btn-block { width: 100%; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08); }

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

@media (min-width: 768px) { .nav-inner { height: 5rem; } }

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-logo-icon {
    width: 2.5rem; height: 2.5rem;
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-menu {
    display: none;
    align-items: center;
    gap: 2rem;
}

@media (min-width: 768px) { .nav-menu { display: flex; } }

.nav-link {
    color: var(--gray-600);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover { color: var(--primary); }

.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    padding: 0.5rem;
}

@media (min-width: 768px) { .nav-toggle { display: none; } }

.mobile-menu {
    display: none;
    background: white;
    border-top: 1px solid var(--gray-200);
    padding: 1rem;
}

.mobile-menu.open { display: block; }

@media (min-width: 768px) { .mobile-menu { display: none !important; } }

.mobile-menu a,
.mobile-menu button {
    display: block;
    width: 100%;
    padding: 0.75rem 0.5rem;
    text-align: left;
    color: var(--gray-600);
    font-weight: 500;
}

.mobile-menu a:hover { color: var(--primary); }

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 5rem;
    padding-bottom: 4rem;
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
}

@media (min-width: 768px) { .hero { padding-top: 6rem; padding-bottom: 5rem; } }

.hero-bg-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(64px);
    pointer-events: none;
}

.hero-bg-1 {
    top: 5rem; right: 2.5rem;
    width: 18rem; height: 18rem;
    background: rgba(30, 58, 95, 0.05);
}

.hero-bg-2 {
    bottom: 5rem; left: 2.5rem;
    width: 24rem; height: 24rem;
    background: rgba(13, 148, 136, 0.05);
}

.hero-grid {
    position: relative;
    display: grid;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 1024px) { .hero-grid { grid-template-columns: 1fr 1fr; } }

.hero-content { display: flex; flex-direction: column; gap: 2rem; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(13, 148, 136, 0.1);
    color: var(--secondary);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    width: fit-content;
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
}

@media (min-width: 640px) { .hero-title { font-size: 2.75rem; } }
@media (min-width: 768px) { .hero-title { font-size: 3.25rem; } }
@media (min-width: 1024px) { .hero-title { font-size: 3.75rem; } }

.hero-title .gradient {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.75;
    max-width: 36rem;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) { .hero-actions { flex-direction: row; } }

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding-top: 1rem;
    flex-wrap: wrap;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary);
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.hero-divider {
    width: 1px;
    height: 3rem;
    background: var(--gray-200);
}

.hero-visual {
    position: relative;
    animation: fadeUp 0.6s ease-out 0.2s forwards;
    opacity: 0;
}

.hero-image-wrap {
    position: relative;
}

.hero-image-glow {
    position: absolute;
    inset: -1rem;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.2) 0%, rgba(13, 148, 136, 0.2) 100%);
    border-radius: 1.5rem;
    filter: blur(48px);
}

.hero-image {
    position: relative;
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: float 6s ease-in-out infinite;
}

.hero-float-card {
    position: absolute;
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: fadeUp 0.6s ease-out forwards;
    opacity: 0;
}

.hero-float-card.bl { bottom: -1rem; left: -1rem; animation-delay: 0.4s; }
.hero-float-card.tr { top: -1rem; right: -1rem; animation-delay: 0.6s; }

.hero-float-icon {
    width: 3rem; height: 3rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-float-icon.secondary { background: rgba(13, 148, 136, 0.1); color: var(--secondary); }
.hero-float-icon.accent { background: rgba(249, 115, 22, 0.1); color: var(--accent); }

.hero-float-title { font-weight: 600; color: var(--dark); font-size: 0.95rem; }
.hero-float-sub { font-size: 0.75rem; color: var(--gray-500); }

.hero-wave {
    position: absolute;
    bottom: -1px; left: 0; right: 0;
    width: 100%;
    pointer-events: none;
}

/* ===== 通用 Section ===== */
.section {
    padding: 4rem 0;
}

@media (min-width: 768px) { .section { padding: 5rem 0; } }

.section-light { background: white; }
.section-gray { background: var(--gray-50); }
.section-gradient { background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%); }

.section-header {
    text-align: center;
    max-width: 48rem;
    margin: 0 auto 3rem;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.section-tag.primary { background: rgba(30, 58, 95, 0.1); color: var(--primary); }
.section-tag.secondary { background: rgba(13, 148, 136, 0.1); color: var(--secondary); }
.section-tag.accent { background: rgba(249, 115, 22, 0.1); color: var(--accent); }

.section-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 1rem;
}

@media (min-width: 768px) { .section-title { font-size: 2.25rem; } }

.section-subtitle {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== 痛点卡片 (3列) ===== */
.pain-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) { .pain-grid { grid-template-columns: repeat(3, 1fr); } }

.pain-card {
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    background: white;
    border: 1px solid var(--gray-100);
}

.pain-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(30, 58, 95, 0.12);
}

.pain-card.primary { background: linear-gradient(135deg, rgba(30, 58, 95, 0.04) 0%, rgba(13, 148, 136, 0.04) 100%); }
.pain-card.secondary { background: rgba(13, 148, 136, 0.04); }
.pain-card.accent { background: rgba(249, 115, 22, 0.04); }

.pain-icon {
    width: 4rem; height: 4rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.pain-icon.primary { background: rgba(30, 58, 95, 0.1); color: var(--primary); }
.pain-icon.secondary { background: rgba(13, 148, 136, 0.1); color: var(--secondary); }
.pain-icon.accent { background: rgba(249, 115, 22, 0.1); color: var(--accent); }

.pain-title { font-size: 1.125rem; font-weight: 600; color: var(--dark); margin-bottom: 0.5rem; }
.pain-desc { color: var(--gray-600); font-size: 0.95rem; }

/* ===== 核心价值卡片 (4列) ===== */
.value-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 640px) { .value-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .value-grid { grid-template-columns: repeat(4, 1fr); } }

.value-card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-100);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(30, 58, 95, 0.12);
}

.value-icon {
    width: 3.5rem; height: 3.5rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.value-icon.primary { background: rgba(30, 58, 95, 0.1); color: var(--primary); }
.value-icon.secondary { background: rgba(13, 148, 136, 0.1); color: var(--secondary); }
.value-icon.accent { background: rgba(249, 115, 22, 0.1); color: var(--accent); }
.value-icon.green { background: rgba(34, 197, 94, 0.1); color: var(--green-500); }

.value-title { font-size: 1.125rem; font-weight: 600; color: var(--dark); margin-bottom: 0.75rem; }
.value-desc { color: var(--gray-600); font-size: 0.875rem; line-height: 1.7; }

/* ===== 功能区 (Tabs) ===== */
.tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    font-weight: 500;
    color: var(--gray-600);
    background: white;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.tab-btn:hover { background: var(--gray-50); }
.tab-btn.active {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    color: white;
    border-color: transparent;
}

.feature-grid {
    display: grid;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 1024px) { .feature-grid { grid-template-columns: 1fr 1fr; } }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeUp 0.4s ease-out; }

.feature-title { font-size: 1.5rem; font-weight: 700; color: var(--dark); margin-bottom: 1rem; }
.feature-desc { color: var(--gray-600); margin-bottom: 1.5rem; line-height: 1.7; }

.feature-list { display: flex; flex-direction: column; gap: 0.75rem; }

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--gray-600);
}

.feature-item svg { flex-shrink: 0; margin-top: 0.25rem; color: var(--secondary); }

.feature-image-wrap { position: relative; }

.feature-image-glow {
    position: absolute;
    inset: -1rem;
    background: rgba(13, 148, 136, 0.1);
    border-radius: 1.5rem;
    filter: blur(48px);
}

.feature-image {
    position: relative;
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.15);
}

/* ===== 硬件优势 ===== */
.hardware-grid {
    display: grid;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 1024px) { .hardware-grid { grid-template-columns: 1fr 1fr; } }

.hardware-image-wrap { position: relative; }

.hardware-image-glow {
    position: absolute;
    inset: -1rem;
    background: rgba(30, 58, 95, 0.1);
    border-radius: 1.5rem;
    filter: blur(48px);
}

.hardware-image {
    position: relative;
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.15);
}

.hardware-list {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 640px) { .hardware-list { grid-template-columns: 1fr 1fr; } }

.hardware-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.hardware-check {
    width: 2rem; height: 2rem;
    border-radius: 9999px;
    background: rgba(13, 148, 136, 0.1);
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hardware-item h4 { font-weight: 600; color: var(--dark); margin-bottom: 0.25rem; font-size: 1rem; }
.hardware-item p { font-size: 0.875rem; color: var(--gray-600); }

.hardware-item.full-width { grid-column: 1 / -1; }

/* ===== 应用场景 ===== */
.scenario-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

@media (min-width: 640px) { .scenario-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .scenario-grid { grid-template-columns: repeat(4, 1fr); } }

.scenario-card {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    height: 12rem;
    transition: all 0.3s ease;
}

.scenario-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15); }

.scenario-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.scenario-card:hover .scenario-image { transform: scale(1.1); }

.scenario-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
}

.scenario-title {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 1rem;
    color: white;
    font-weight: 600;
    z-index: 2;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    padding: 4rem 0;
    color: white;
}

@media (min-width: 768px) { .cta-section { padding: 5rem 0; } }

.cta-inner { text-align: center; max-width: 56rem; margin: 0 auto; }

.cta-title { font-size: 1.875rem; font-weight: 700; margin-bottom: 1rem; }
@media (min-width: 768px) { .cta-title { font-size: 2.25rem; } }

.cta-subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 2rem;
    line-height: 1.7;
}

@media (min-width: 768px) { .cta-subtitle { font-size: 1.125rem; } }

.cta-form {
    max-width: 32rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 640px) { .cta-form { flex-direction: row; } }

.cta-input {
    flex: 1;
    padding: 0.875rem 1.5rem;
    border-radius: 9999px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.15);
    color: white;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s;
}

.cta-input::placeholder { color: rgba(255, 255, 255, 0.6); }
.cta-input:focus { background: rgba(255, 255, 255, 0.25); border-color: white; }

.cta-note { color: rgba(255, 255, 255, 0.6); font-size: 0.875rem; margin-top: 1rem; }

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 0;
}

.footer-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }

.footer-brand-col { grid-column: span 1; }
@media (min-width: 768px) { .footer-brand-col { grid-column: span 1; } }

.footer-desc {
    color: var(--gray-400);
    margin: 1rem 0;
    line-height: 1.7;
    font-size: 0.9rem;
}

.footer-socials { display: flex; gap: 0.75rem; margin-top: 1rem; }

.footer-social {
    width: 2.5rem; height: 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: background 0.2s;
}

.footer-social:hover { background: rgba(255, 255, 255, 0.2); }

.footer-title { font-weight: 600; margin-bottom: 1rem; font-size: 1rem; }

.footer-list { display: flex; flex-direction: column; gap: 0.5rem; }

.footer-list a, .footer-list li {
    color: var(--gray-400);
    font-size: 0.9rem;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-list a:hover { color: white; }

.footer-bottom {
    margin-top: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    text-align: center;
}

@media (min-width: 768px) { .footer-bottom { flex-direction: row; text-align: left; } }

.footer-bottom p { color: var(--gray-400); font-size: 0.875rem; }

.footer-legal { display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; }
@media (min-width: 768px) { .footer-legal { justify-content: flex-end; } }

.footer-legal a { color: var(--gray-400); font-size: 0.875rem; }
.footer-legal a:hover { color: white; }

.footer-beian {
    padding: 1rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.1);
}

.beian-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

@media (min-width: 640px) { .beian-links { flex-direction: row; justify-content: center; gap: 1.5rem; } }

.beian-links a {
    color: var(--gray-500);
    font-size: 0.825rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: color 0.2s;
}

.beian-links a:hover { color: var(--gray-300); }

.beian-links svg { width: 16px; height: 16px; }

.float-report-btn {
    position: fixed;
    right: 1rem;
    bottom: 3rem;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border-radius: 9999px;
    font-weight: 500;
    font-size: 0.875rem;
    box-shadow: 0 4px 16px rgba(239, 68, 68, 0.35);
    transition: all 0.3s ease;
    text-decoration: none;
}

.float-report-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.45);
}

@media (min-width: 768px) {
    .float-report-btn {
        right: 2rem;
        bottom: 4rem;
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
}

.float-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== 安全投诉举报页面 ===== */
.safe-report-header {
    background: linear-gradient(135deg, #1e3a5f 0%, #0d9488 100%);
    color: white;
    padding: 5rem 0 3rem;
    text-align: center;
}

.report-header-inner {
    max-width: 48rem;
    margin: 0 auto;
}

.report-icon {
    width: 6rem;
    height: 6rem;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.report-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

@media (min-width: 768px) { .report-title { font-size: 2.5rem; } }

.report-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

.report-contact-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 640px) { .report-contact-grid { grid-template-columns: repeat(3, 1fr); } }

.report-contact-card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--gray-100);
    transition: all 0.3s ease;
}

.report-contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon.email { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.contact-icon.phone { background: rgba(34, 197, 94, 0.1); color: #22c55e; }
.contact-icon.time { background: rgba(13, 148, 136, 0.1); color: var(--secondary); }

.report-contact-card h3 {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.contact-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.5rem;
    display: block;
}

.report-contact-card a.contact-value:hover { color: var(--secondary); }

.contact-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.5;
}

.report-form {
    max-width: 48rem;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--gray-100);
}

@media (min-width: 768px) { .report-form { padding: 2.5rem; } }

.form-row {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) { .form-row { flex-direction: row; } }

.form-group {
    margin-bottom: 1.25rem;
    flex: 1;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group .required {
    color: #ef4444;
    margin-left: 0.25rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--gray-200);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--dark);
    outline: none;
    transition: all 0.2s;
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-400);
}

.form-group textarea {
    resize: vertical;
    min-height: 10rem;
}

.upload-area {
    position: relative;
    border: 2px dashed var(--gray-200);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--secondary);
    background: rgba(13, 148, 136, 0.02);
}

.upload-area input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-hint {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-500);
}

.upload-hint svg { color: var(--gray-400); }

.upload-limit {
    font-size: 0.825rem;
    color: var(--gray-400);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.checkbox-group label {
    font-weight: 400;
    color: var(--gray-600);
    font-size: 0.875rem;
}

.privacy-card {
    max-width: 48rem;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--gray-100);
}

.privacy-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-50);
}

.privacy-item:last-child { border-bottom: none; }

.privacy-check {
    width: 2rem;
    height: 2rem;
    border-radius: 9999px;
    background: rgba(34, 197, 94, 0.1);
    color: var(--green-500);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.privacy-item h4 {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.privacy-item p {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===== 动画 ===== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-up {
    opacity: 0;
    animation: fadeUp 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }