/* ============================================
   知之行之 - 企业官网样式表
   主题色：浅蓝色 + 天蓝色
   ============================================ */

/* ===== CSS 变量 ===== */
:root {
    --sky-50: #f0f9ff;
    --sky-100: #e0f2fe;
    --sky-200: #bae6fd;
    --sky-300: #7dd3fc;
    --sky-400: #38bdf8;
    --sky-500: #0ea5e9;
    --sky-600: #0284c7;
    --sky-700: #0369a1;
    --sky-800: #075985;
    --sky-900: #0c4a6e;

    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;

    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    --white: #ffffff;
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --accent: #3b82f6;

    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 50%, #7dd3fc 100%);
    --gradient-hero: linear-gradient(135deg, #0c4a6e 0%, #0369a1 35%, #0ea5e9 70%, #38bdf8 100%);
    --gradient-card: linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%);
    --gradient-soft: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);

    --shadow-sm: 0 1px 3px rgba(2, 132, 199, 0.08);
    --shadow-md: 0 4px 20px rgba(2, 132, 199, 0.12);
    --shadow-lg: 0 10px 40px rgba(2, 132, 199, 0.15);
    --shadow-xl: 0 20px 60px rgba(2, 132, 199, 0.2);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --container-max: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--slate-700);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    outline: none;
}

/* ===== 容器 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(14, 165, 233, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--sky-700);
    border: 2px solid var(--sky-400);
}

.btn-outline:hover {
    background: var(--sky-50);
    border-color: var(--sky-500);
    transform: translateY(-2px);
}

.btn-white {
    background: var(--white);
    color: var(--sky-700);
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 16px 44px;
    font-size: 1.05rem;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--sky-100);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--sky-800);
    letter-spacing: 1px;
}

.nav-logo .logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.35);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a {
    padding: 8px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--slate-600);
    border-radius: 50px;
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--sky-600);
    background: var(--sky-50);
}

.nav-cta {
    margin-left: 16px;
    padding: 10px 28px !important;
    background: var(--gradient-primary);
    color: var(--white) !important;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.35);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.45);
    background: var(--gradient-primary) !important;
}

.nav-cta-outline {
    margin-left: 8px;
    padding: 9px 22px !important;
    background: transparent;
    color: var(--sky-600) !important;
    border: 1.5px solid var(--sky-500);
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.nav-cta-outline:hover {
    background: var(--sky-500);
    color: var(--white) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2.5px;
    background: var(--sky-700);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ===== Hero 通用 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(14, 165, 233, 0.12);
    border: 1px solid rgba(14, 165, 233, 0.25);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--sky-700);
    margin-bottom: 24px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--sky-500);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--slate-500);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Page Banner (子页面) ===== */
.page-banner {
    position: relative;
    padding: 160px 0 80px;
    background: var(--gradient-hero);
    color: var(--white);
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
    border-radius: 50%;
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(125, 211, 252, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.page-banner .container {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-banner h1 {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.page-banner p {
    font-size: 1.1rem;
    opacity: 0.85;
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 28px;
    font-size: 0.9rem;
    opacity: 0.7;
}

.breadcrumb a:hover {
    opacity: 1;
    color: var(--sky-200);
}

/* ===== Section 通用 ===== */
.section {
    padding: 90px 0;
}

.section-soft {
    background: var(--gradient-soft);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: var(--sky-100);
    color: var(--sky-600);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--slate-800);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--slate-500);
    line-height: 1.8;
}

/* ===== 服务卡片 ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    border: 1px solid var(--sky-100);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--sky-200);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    background: var(--gradient-card);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--gradient-primary);
    transform: scale(1.05);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--sky-500);
    transition: var(--transition);
}

.service-card:hover .service-icon svg {
    stroke: var(--white);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--slate-500);
    line-height: 1.8;
    margin-bottom: 16px;
}

.service-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--sky-600);
    font-weight: 600;
    font-size: 0.9rem;
}

.service-card .card-link:hover {
    gap: 10px;
    color: var(--sky-700);
}

/* ===== 统计数据 ===== */
.stats-section {
    background: var(--gradient-hero);
    padding: 70px 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='g' width='60' height='60' patternUnits='userSpaceOnUse'%3E%3Cpath d='M60 0H0V60' fill='none' stroke='%23ffffff' stroke-width='0.5' opacity='0.05'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23g)'/%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    position: relative;
    z-index: 2;
}

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-num {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(180deg, #ffffff 0%, #bae6fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
    letter-spacing: 1px;
}

/* ===== 特性区域 ===== */
.feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.feature-row:last-child {
    margin-bottom: 0;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text .section-tag {
    margin-bottom: 16px;
}

.feature-text h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 20px;
    line-height: 1.4;
}

.feature-text p {
    color: var(--slate-500);
    line-height: 1.9;
    margin-bottom: 24px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--slate-600);
    font-size: 0.98rem;
}

.feature-list li .check-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--sky-100);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}

.feature-list li .check-icon svg {
    width: 14px;
    height: 14px;
    stroke: var(--sky-600);
}

.feature-visual {
    flex: 1;
    position: relative;
}

.feature-img-card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
    min-height: 320px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.feature-img-card .floating-icon {
    position: absolute;
    border-radius: var(--radius-md);
    background: var(--white);
    box-shadow: var(--shadow-md);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 1;
}

.feature-img-card > *:not(.floating-icon) {
    position: relative;
    z-index: 2;
}

.feature-img-card .floating-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--sky-500);
}

.feature-img-card .floating-icon:nth-child(1) {
    top: 20px;
    right: 30px;
    animation: float 4s ease-in-out infinite;
}

.feature-img-card .floating-icon:nth-child(2) {
    top: 20px;
    left: 30px;
    animation: float 4s ease-in-out infinite 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.feature-img-card .card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--sky-800);
}

.feature-img-card .card-desc {
    color: var(--slate-500);
    font-size: 0.95rem;
}

.feature-img-card .card-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.feature-img-card .card-tags span {
    padding: 6px 16px;
    background: var(--white);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--sky-600);
    box-shadow: var(--shadow-sm);
}

/* ===== 合作伙伴 / 代理服务 ===== */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.partner-card {
    background: var(--white);
    border: 2px solid var(--sky-100);
    border-radius: var(--radius-lg);
    padding: 36px;
    text-align: center;
    transition: var(--transition);
}

.partner-card:hover {
    border-color: var(--sky-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.partner-logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    background: var(--white);
    border: 1px solid var(--sky-100);
    padding: 8px;
    overflow: hidden;
}

.partner-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 10px;
}

.partner-card .partner-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--sky-50);
    color: var(--sky-600);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 14px;
}

.partner-card p {
    font-size: 0.92rem;
    color: var(--slate-500);
    line-height: 1.8;
}

/* ===== CTA 区域 ===== */
.cta-section {
    padding: 80px 0;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.3) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(125, 211, 252, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 680px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.85;
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 留言框 (浮动) ===== */
.message-float {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
}

.message-float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.4);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.message-float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(14, 165, 233, 0.5);
}

.message-float-btn svg {
    width: 28px;
    height: 28px;
    stroke: var(--white);
}

.message-float-btn .badge-dot {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 12px;
    height: 12px;
    background: #ef4444;
    border-radius: 50%;
    border: 2px solid var(--white);
}

/* 留言弹窗 */
.message-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(12, 74, 110, 0.5);
    backdrop-filter: blur(6px);
    z-index: 1001;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.message-modal-overlay.show {
    display: flex;
    opacity: 1;
}

.message-modal {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 520px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

.message-modal-overlay.show .message-modal {
    transform: translateY(0);
}

.message-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.message-modal-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--slate-800);
}

.message-modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--slate-100);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--slate-500);
    transition: var(--transition);
}

.message-modal-close:hover {
    background: var(--slate-200);
    color: var(--slate-700);
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--slate-600);
    margin-bottom: 8px;
}

.form-group label .required {
    color: #ef4444;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 18px;
    border: 2px solid var(--slate-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--slate-700);
    transition: var(--transition);
    background: var(--slate-50);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--sky-400);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-success {
    display: none;
    text-align: center;
    padding: 32px 16px;
}

.form-success.show {
    display: block;
}

.form-success .success-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: #d1fae5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-success .success-icon svg {
    width: 36px;
    height: 36px;
    stroke: #10b981;
}

.form-success h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 8px;
}

.form-success p {
    color: var(--slate-500);
}

/* ===== 关于我们 - 使命愿景价值观 ===== */
.mvv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.mvv-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 44px 36px;
    text-align: center;
    border: 1px solid var(--sky-100);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.mvv-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.mvv-card .mvv-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mvv-card .mvv-icon svg {
    width: 34px;
    height: 34px;
    stroke: var(--sky-500);
}

.mvv-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 14px;
}

.mvv-card p {
    color: var(--slate-500);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ===== 时间线 ===== */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--sky-300) 0%, var(--sky-100) 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -34px;
    top: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--white);
    border: 4px solid var(--sky-400);
    box-shadow: 0 0 0 4px var(--sky-100);
}

.timeline-year {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--sky-600);
    margin-bottom: 6px;
}

.timeline-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 8px;
}

.timeline-desc {
    color: var(--slate-500);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ===== 产品详情卡片 ===== */
.product-detail {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 90px;
    padding: 0 0 90px;
    border-bottom: 1px solid var(--sky-100);
}

.product-detail:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.product-detail.reverse {
    flex-direction: row-reverse;
}

.product-detail-visual {
    flex: 1;
}

.product-detail-info {
    flex: 1;
}

.product-detail-info .product-num {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--sky-100);
    line-height: 1;
    margin-bottom: 10px;
}

.product-detail-info h3 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--slate-800);
    margin-bottom: 16px;
}

.product-detail-info .product-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--sky-100);
    color: var(--sky-700);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.product-detail-info > p {
    color: var(--slate-500);
    line-height: 1.9;
    margin-bottom: 24px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 28px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--slate-600);
}

.product-features li::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--sky-400);
    flex-shrink: 0;
}

/* 产品视觉卡片 */
.product-visual-card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    padding: 40px;
    min-height: 340px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.product-visual-card .big-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.product-visual-card .big-icon svg {
    width: 42px;
    height: 42px;
    stroke: var(--sky-500);
}

.product-visual-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--sky-800);
    margin-bottom: 10px;
}

.product-visual-card .visual-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.product-visual-card .visual-tags span {
    padding: 6px 16px;
    background: var(--white);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--sky-600);
    box-shadow: var(--shadow-sm);
}

/* ===== 联系页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.contact-info-card {
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.contact-info-card::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
    border-radius: 50%;
}

.contact-info-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 2;
}

.contact-info-card .sub {
    opacity: 0.8;
    margin-bottom: 32px;
    position: relative;
    z-index: 2;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    position: relative;
    z-index: 2;
}

.contact-info-item .ci-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-item .ci-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--white);
}

.contact-info-item .ci-text .label {
    font-size: 0.82rem;
    opacity: 0.7;
    margin-bottom: 2px;
}

.contact-info-item .ci-text .value {
    font-size: 1rem;
    font-weight: 600;
}

.contact-form-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--sky-100);
}

.contact-form-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 8px;
}

.contact-form-card .sub {
    color: var(--slate-500);
    margin-bottom: 28px;
    font-size: 0.95rem;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--slate-900);
    color: var(--slate-400);
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-link-disabled {
    color: rgba(255, 255, 255, 0.3);
    cursor: not-allowed;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-link-disabled:hover {
    color: rgba(255, 255, 255, 0.3);
}

.coming-soon-tag {
    font-size: 0.6rem;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    color: rgba(255, 255, 255, 0.4);
    white-space: nowrap;
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--white);
    font-size: 1.3rem;
    font-weight: 800;
}

.footer-brand .footer-logo .logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.footer-brand p {
    font-size: 0.92rem;
    line-height: 1.9;
    margin-bottom: 20px;
    max-width: 340px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--sky-500);
    transform: translateY(-3px);
}

.footer-social a svg {
    width: 20px;
    height: 20px;
    stroke: var(--slate-300);
    transition: var(--transition);
}

.footer-social a:hover svg {
    stroke: var(--white);
}

.footer-brand-row {
    display: flex;
    align-items: flex-end;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-qrcode {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.footer-qrcode img {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-sm);
    background: var(--white);
    padding: 4px;
    object-fit: contain;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.footer-qrcode span {
    font-size: 0.78rem;
    color: var(--slate-400);
    text-align: center;
    white-space: nowrap;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 0.92rem;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--sky-400);
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
}

.footer-bottom p {
    color: var(--slate-500);
}

.footer-bottom a {
    color: var(--sky-400);
}

/* ===== 动画 ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-title { font-size: 2.6rem; }
    .section-title { font-size: 1.9rem; }
    .feature-row, .product-detail { flex-direction: column; gap: 40px; }
    .feature-row.reverse, .product-detail.reverse { flex-direction: column; }
    .mvv-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .page-banner h1 { font-size: 2.1rem; }
    .nav-cta-outline { margin-left: 4px; padding: 7px 16px !important; font-size: 0.88rem; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        align-items: stretch;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu a {
        padding: 14px 20px;
        border-radius: var(--radius-sm);
    }

    .nav-cta {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
    }

    .nav-toggle { display: flex; }

    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    .section { padding: 60px 0; }
    .section-title { font-size: 1.6rem; }
    .stat-num { font-size: 2.3rem; }
    .cta-content h2 { font-size: 1.7rem; }
    .form-row { grid-template-columns: 1fr; }
    .product-features { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .message-float { bottom: 20px; right: 20px; }
    .product-detail { padding-bottom: 60px; margin-bottom: 60px; }
    .page-banner { padding: 130px 0 60px; }
    .page-banner h1 { font-size: 1.8rem; }
    .footer-brand-row { flex-direction: column; align-items: flex-start; }
    .contact-info-card, .contact-form-card { padding: 32px 24px; }
    .message-modal { padding: 28px; }
}