/* ===== CSS Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-blue: #0071e3;
    --color-blue-hover: #0077ed;
    --color-gray: #f5f5f7;
    --color-border: #d2d2d7;
    --font-chinese: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --nav-height: 60px;
}

html {
    scroll-behavior: smooth;
    /* 防止移动端横向滚动 */
    overflow-x: hidden;
}

body {
    font-family: var(--font-chinese);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.97);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--nav-height);
    position: relative;
}

.nav-logo a {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.5px;
    white-space: nowrap;
}

/* 桌面端导航链接 */
.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: var(--transition-smooth);
    position: relative;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-blue);
    transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active-link {
    color: var(--color-blue);
}

.nav-links a:hover::after,
.nav-links a.active-link::after {
    width: 100%;
}

/* 导航右侧区域 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-cta-btn {
    font-size: 14px;
    padding: 8px 18px;
    white-space: nowrap;
}

/* 汉堡菜单按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
    border-radius: 8px;
    transition: background 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.hamburger:hover {
    background: rgba(0,0,0,0.05);
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

/* 汉堡变 X 动画 */
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 移动端遮罩 */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 998;
    backdrop-filter: blur(2px);
}

.nav-overlay.active {
    display: block;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-block;
    padding: 12px 24px;
    background: var(--color-blue);
    color: white;
    text-decoration: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
    text-align: center;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary:hover {
    background: var(--color-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    background: transparent;
    color: var(--color-blue);
    text-decoration: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    border: 1.5px solid var(--color-blue);
    transition: var(--transition-smooth);
    text-align: center;
    -webkit-tap-highlight-color: transparent;
}

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

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-bg);
}

/* 动态背景层（隐藏） */
.hero-bg {
    display: none;
}

.hero-canvas {
    display: none;
}

/* 光晕球（隐藏） */
.hero-bg-orb {
    display: none;
}

/* Hero 内容 */
.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: calc(var(--nav-height) + 40px) 24px 80px;
    max-width: 860px;
    width: 100%;
    animation: fadeInUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* 顶部标签 */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: var(--color-gray);
    border: 1px solid var(--color-border);
    border-radius: 980px;
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
    margin-bottom: 36px;
}

.hero-badge-dot {
    width: 7px;
    height: 7px;
    background: #30d158;
    border-radius: 50%;
    box-shadow: 0 0 6px #30d158;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.6; transform: scale(1.3); }
}

/* 主标题 */
.hero-title {
    font-size: 72px;
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.hero-title-line {
    color: var(--color-text);
    display: block;
}

.hero-title-accent {
    background: linear-gradient(90deg, #0071e3 0%, #5e5ce6 50%, #30d158 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200%;
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 副标题 */
.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: 44px;
    font-weight: 400;
    line-height: 1.7;
}

/* 按钮组 */
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--color-blue);
    color: white;
    text-decoration: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 500;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.3);
    -webkit-tap-highlight-color: transparent;
}

.btn-hero-primary:hover {
    background: var(--color-blue-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.4);
}

.btn-hero-primary svg {
    transition: transform 0.3s ease;
}

.btn-hero-primary:hover svg {
    transform: translateX(4px);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    padding: 16px 32px;
    background: transparent;
    color: var(--color-blue);
    text-decoration: none;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    border: 1.5px solid var(--color-blue);
    transition: var(--transition-smooth);
    -webkit-tap-highlight-color: transparent;
}

.btn-hero-secondary:hover {
    background: var(--color-blue);
    color: white;
    transform: translateY(-2px);
}

/* 底部统计数据 */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 40px;
    background: var(--color-gray);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    max-width: 520px;
    margin: 0 auto;
}

.hero-stat {
    flex: 1;
    text-align: center;
}

.hero-stat-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: 6px;
}

.hero-stat-num em {
    font-style: normal;
    font-size: 22px;
    font-weight: 500;
    color: var(--color-blue);
}

.hero-stat-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    letter-spacing: 0.3px;
}

.hero-stat-divider {
    width: 1px;
    height: 48px;
    background: var(--color-border);
    flex-shrink: 0;
}

/* 向下滚动箭头 */
.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    text-decoration: none;
    animation: scrollBounce 2s ease-in-out infinite;
}

.hero-scroll-hint span {
    display: block;
    width: 14px;
    height: 14px;
    border-right: 2px solid var(--color-border);
    border-bottom: 2px solid var(--color-border);
    transform: rotate(45deg) translate(-3px, -3px);
    border-radius: 2px;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
    50%       { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* ===== Section Titles ===== */
.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 22px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 60px;
    font-weight: 400;
}

/* ===== Services Section ===== */
.services {
    padding: 90px 20px;
    background: var(--color-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    padding: 36px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    border: 1px solid rgba(0,0,0,0.04);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 72px;
    height: 72px;
    margin-bottom: 20px;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 14px;
}

.service-card p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 15px;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 7px 0;
    color: var(--color-text);
    position: relative;
    padding-left: 22px;
    font-size: 14px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-blue);
    font-weight: 700;
}

/* ===== Cases Section ===== */
.cases {
    padding: 90px 20px;
    background: var(--color-gray);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
}

.case-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.case-image {
    height: 220px;
    overflow: hidden;
}

.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.case-card:hover .case-img {
    transform: scale(1.04);
}

.case-content {
    padding: 26px;
}

.case-tag {
    display: inline-block;
    padding: 5px 14px;
    background: var(--color-blue);
    color: white;
    border-radius: 980px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.case-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.case-content p {
    color: var(--color-text-secondary);
    margin-bottom: 18px;
    line-height: 1.8;
    font-size: 14px;
}

.case-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--color-blue);
}

.stat-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* ===== Partners Section ===== */
.partners {
    padding: 90px 20px;
    background: var(--color-bg);
}

.partner-info {
    text-align: center;
    margin-bottom: 50px;
    padding: 36px 24px;
    background: var(--color-gray);
    border-radius: 20px;
}

.partner-logo h3 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 10px;
}

.partner-logo p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 30px;
}

.product-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    border: 1px solid rgba(0,0,0,0.04);
}

.product-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.product-image {
    height: 180px;
    overflow: hidden;
}

.product-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    font-weight: 600;
}

.product-card h4 {
    padding: 16px 16px 6px;
    font-size: 16px;
    font-weight: 600;
}

.product-card p {
    padding: 0 16px 16px;
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* ===== 平台Logo展示 ===== */
.platform-logos {
    margin-top: 50px;
    padding-top: 50px;
    border-top: 1px solid var(--color-border);
}

.platform-title {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 30px;
    color: var(--color-text);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.platform-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 28px 20px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    border: 1px solid rgba(0,0,0,0.04);
}

.platform-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.platform-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.platform-logo {
    width: 56px;
    height: 56px;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.platform-logo svg,
.platform-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.platform-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.platform-card:hover .platform-logo {
    transform: scale(1.08);
}

.platform-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    text-align: center;
}

.partner-note {
    text-align: center;
    margin-top: 32px;
    color: var(--color-text-secondary);
    font-size: 13px;
}

.partner-note a {
    color: var(--color-blue);
    text-decoration: none;
}

/* ===== Stats Banner ===== */
.stats-banner {
    padding: 80px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-smooth);
}

.stat-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-item .stat-number {
    display: block;
    font-size: 44px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.stat-item .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
}

/* ===== About Section ===== */
.about {
    padding: 90px 20px;
    background: var(--color-gray);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .section-title {
    text-align: left;
}

.about-text .section-subtitle {
    text-align: left;
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 18px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    font-size: 16px;
}

.about-text .btn-primary {
    margin-top: 12px;
    font-size: 16px;
    padding: 12px 28px;
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
}

.about-image-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 20px;
    display: block;
}

.about-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    font-weight: 600;
    border-radius: 20px;
}

/* ===== Contact Section ===== */
.contact {
    padding: 90px 20px;
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 60px;
    margin-top: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.contact-item p {
    color: var(--color-text-secondary);
    font-size: 15px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-size: 16px;
    font-family: var(--font-chinese);
    transition: var(--transition-smooth);
    background: white;
    -webkit-appearance: none;
    appearance: none;
    color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

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

.contact-form .btn-primary {
    align-self: flex-start;
    font-size: 16px;
}

/* ===== Footer ===== */
.footer {
    padding: 60px 20px 36px;
    background: var(--color-gray);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 36px;
    margin-bottom: 36px;
}

.footer-section h4 {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.footer-section ul li a:hover {
    color: var(--color-blue);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-blue);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

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

/* ===== 平板端 768px ~ 1024px ===== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .platform-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 导航折叠断点 ===== */
@media (max-width: 900px) {
    /* 隐藏桌面端导航链接，显示汉堡按钮 */
    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 20px;
        gap: 0;
        z-index: 999;
        overflow-y: auto;
        box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: 16px 0;
        font-size: 18px;
        font-weight: 500;
        border-bottom: 1px solid var(--color-border);
        color: var(--color-text);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-links a::after {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .nav-cta-btn {
        display: none;
    }
}

/* ===== 手机端 ≤ 640px ===== */
@media (max-width: 640px) {
    :root {
        --nav-height: 56px;
    }

    /* Hero */
    .hero-inner {
        padding: calc(var(--nav-height) + 28px) 20px 72px;
    }

    .hero-badge {
        font-size: 12px;
        padding: 7px 14px;
        margin-bottom: 24px;
    }

    .hero-title {
        font-size: 40px;
        letter-spacing: -1px;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 32px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 40px;
    }

    .btn-hero-primary,
    .btn-hero-secondary {
        width: 100%;
        justify-content: center;
        font-size: 16px;
        padding: 14px 24px;
    }

    .hero-stats {
        padding: 20px 24px;
        gap: 0;
    }

    .hero-stat-num {
        font-size: 26px;
    }

    .hero-stat-num em {
        font-size: 16px;
    }

    .hero-stat-label {
        font-size: 11px;
    }

    .hero-stat-divider {
        height: 36px;
    }

    .orb1, .orb2 { display: none; }

    /* Section titles */
    .section-title {
        font-size: 28px;
        letter-spacing: -0.3px;
    }

    .section-subtitle {
        font-size: 16px;
        margin-bottom: 32px;
    }

    /* Sections padding */
    .services,
    .cases,
    .partners,
    .about,
    .contact {
        padding: 60px 16px;
    }

    .stats-banner {
        padding: 56px 16px;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 32px;
    }

    .service-card {
        padding: 24px;
    }

    .service-card h3 {
        font-size: 20px;
    }

    /* Cases */
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .case-image {
        height: 180px;
    }

    .case-content {
        padding: 20px;
    }

    .case-content h3 {
        font-size: 18px;
    }

    .stat-number {
        font-size: 24px;
    }

    /* Partners */
    .partner-info {
        padding: 24px 16px;
    }

    .partner-logo h3 {
        font-size: 22px;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .product-image {
        height: 140px;
    }

    .product-card h4 {
        font-size: 14px;
        padding: 12px 12px 4px;
    }

    .product-card p {
        font-size: 12px;
        padding: 0 12px 12px;
    }

    /* Platform logos */
    .platform-logos {
        margin-top: 40px;
        padding-top: 40px;
    }

    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .platform-card {
        padding: 20px 16px;
    }

    .platform-logo {
        width: 48px;
        height: 48px;
    }

    /* Stats banner */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .stat-item .stat-number {
        font-size: 36px;
    }

    .stat-item .stat-label {
        font-size: 14px;
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-text .section-title {
        text-align: center;
    }

    .about-text .section-subtitle {
        text-align: center;
    }

    .about-placeholder {
        height: 240px;
        font-size: 18px;
    }

    .about-text .btn-primary {
        display: block;
        width: 100%;
        text-align: center;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        margin-top: 32px;
    }

    .contact-form .btn-primary {
        align-self: stretch;
        width: 100%;
        font-size: 16px;
        padding: 14px;
    }

    /* Footer */
    .footer {
        padding: 40px 16px 24px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .footer-links {
        gap: 14px;
    }
}

/* ===== 超小屏 ≤ 360px ===== */
@media (max-width: 360px) {
    .hero-title {
        font-size: 28px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .platform-card {
        padding: 20px 12px;
    }

    .platform-logo {
        width: 44px;
        height: 44px;
    }

    .platform-name {
        font-size: 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* =============================================
   最新时讯模块
   ============================================= */

/* ---- 滚动条（Ticker Bar）---- */
.news-ticker-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
    border-bottom: none;
}

.ticker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 44px;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.ticker-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.9);
    white-space: nowrap;
}

.ticker-dot {
    width: 7px;
    height: 7px;
    background: #ff3b30;
    border-radius: 50%;
    box-shadow: 0 0 8px #ff3b30;
    animation: pulse 1.5s ease-in-out infinite;
}

.ticker-more {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.2s;
}

.ticker-more:hover {
    color: rgba(255,255,255,0.9);
}

/* 滚动轨道 */
.ticker-bar {
    height: 44px;
    overflow: hidden;
    position: relative;
    /* 左右渐隐 */
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
}

.ticker-track {
    display: flex;
    align-items: center;
    height: 100%;
    white-space: nowrap;
    will-change: transform;
    /* 动画由 JS 控制 */
}

.ticker-item {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0 32px;
    flex-shrink: 0;
    cursor: pointer;
    transition: opacity 0.2s;
}

.ticker-item:hover {
    opacity: 0.75;
}

.ticker-item-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    background: var(--color-blue);
    color: white;
    flex-shrink: 0;
}

.ticker-item-tag.tag-hot {
    background: #ff3b30;
}

.ticker-item-title {
    font-size: 13px;
    color: rgba(255,255,255,0.85);
    max-width: 420px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ticker-item-date {
    font-size: 11px;
    color: rgba(255,255,255,0.35);
    flex-shrink: 0;
}

.ticker-sep {
    display: inline-block;
    width: 1px;
    height: 16px;
    background: rgba(255,255,255,0.15);
    flex-shrink: 0;
    margin: 0 8px;
}

/* ---- 时讯卡片列表 ---- */
.news-list {
    padding: 90px 20px;
    background: var(--color-gray);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 0;
}

.news-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.04);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(20px);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.news-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.09);
}

.news-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.news-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 980px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(0,113,227,0.1);
    color: var(--color-blue);
}

.news-tag.tag-hot {
    background: rgba(255,59,48,0.1);
    color: #ff3b30;
}

.news-hot-badge {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 10px;
    color: #ff3b30;
    font-weight: 600;
}

.news-date {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-left: auto;
}

.news-card h3 {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.news-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 10px;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.news-source {
    font-size: 11px;
    color: var(--color-text-secondary);
}

.news-read-more {
    font-size: 12px;
    color: var(--color-blue);
    font-weight: 500;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: var(--font-chinese);
    transition: color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.news-read-more:hover {
    color: var(--color-blue-hover);
    text-decoration: underline;
}

/* ---- 新闻详情弹窗 ---- */
#newsModal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.25s ease;
}

#newsModal.visible {
    opacity: 1;
}

.news-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.news-modal-box {
    position: relative;
    background: white;
    border-radius: 20px;
    padding: 36px;
    max-width: 540px;
    width: 100%;
    box-shadow: 0 24px 60px rgba(0,0,0,0.2);
    transform: translateY(16px);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

#newsModal.visible .news-modal-box {
    transform: translateY(0);
}

.news-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    background: var(--color-gray);
    border: none;
    border-radius: 50%;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: background 0.2s;
    font-family: var(--font-chinese);
    -webkit-tap-highlight-color: transparent;
}

.news-modal-close:hover {
    background: var(--color-border);
}

.news-modal-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.news-modal-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: 16px;
}

.news-modal-body {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.news-modal-footer {
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    font-size: 12px;
    color: var(--color-text-secondary);
}

@media (max-width: 640px) {
    .news-modal-box {
        padding: 24px 20px;
    }

    .news-modal-title {
        font-size: 17px;
        padding-right: 28px;
    }
}

.news-footer {
    text-align: center;
    margin-top: 32px;
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .news-list {
        padding: 60px 16px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .ticker-header {
        padding: 0 16px;
    }

    .ticker-item-title {
        max-width: 220px;
    }
}