:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-bg: #eef2ff;
    --secondary: #7c3aed;
    --accent-orange: #f59e0b;
    --accent-green: #10b981;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-gray: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1, #7c3aed, #6366f1);
    background-size: 200% 200%;
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: gradientShift 3s ease infinite;
}

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

.btn-primary::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.15) 50%,
        transparent 70%
    );
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-bg);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 60px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    padding: 16px 24px 24px;
    border-top: 1px solid var(--border);
}

.mobile-link {
    display: block;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.mobile-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 0;
}

.mobile-link-danger {
    color: #ef4444;
}

/* ========== 用户下拉菜单 ========== */
.user-dropdown {
    position: relative;
}

.user-avatar-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-bg);
    border: 1.5px solid var(--primary-light);
    border-radius: 24px;
    padding: 4px 14px 4px 6px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--primary);
}

.user-avatar-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
}

.dropdown-arrow {
    transition: transform 0.2s ease;
}

.user-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 1001;
    overflow: hidden;
}

.user-dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-bg), #f5f3ff);
}

.dropdown-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.dropdown-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dropdown-user-detail {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dropdown-username {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.dropdown-credits {
    font-size: 12px;
    color: var(--text-secondary);
}

.dropdown-credits strong {
    color: var(--accent-orange);
    font-weight: 700;
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--bg-gray);
    color: var(--primary);
}

.dropdown-item svg {
    flex-shrink: 0;
    opacity: 0.6;
}

.dropdown-item:hover svg {
    opacity: 1;
}

.dropdown-item-danger {
    color: #ef4444;
}

.dropdown-item-danger:hover {
    background: #fef2f2;
    color: #dc2626;
}

.dropdown-item-danger svg {
    color: #ef4444;
    opacity: 0.7;
}

/* ========== Hero 区 ========== */
.hero {
    position: relative;
    padding: 140px 0 80px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(180deg, #f0f0ff 0%, #ffffff 100%);
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-light);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-purple);
    bottom: -50px;
    left: -50px;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-blue);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 100px;
    padding: 8px 20px;
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 28px;
    animation: fadeInDown 0.6s ease;
}

.badge-icon {
    font-size: 16px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-highlight {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.highlight-badge {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 8px 16px;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: 24px;
}

.highlight-number {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.highlight-text {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 500;
}

.highlight-unit {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 10px 40px rgba(99, 102, 241, 0.15);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 15px 50px rgba(99, 102, 241, 0.25);
    }
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 36px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 证书展示区 ========== */
.certificates {
    padding: 0;
    background: transparent;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.section-subtitle strong {
    color: var(--primary);
}

.section-note {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 8px;
}

.hero .section-header {
    text-align: center;
    margin-bottom: 24px;
    margin-top: 40px;
}

.hero .section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.hero .section-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero .section-subtitle strong {
    color: var(--primary);
}

.hero .section-note {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.cert-scroll-wrapper {
    overflow: hidden;
    position: relative;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.cert-scroll-track {
    display: flex;
    gap: 20px;
    animation: certScroll 40s linear infinite;
    width: max-content;
}

.cert-scroll-track:hover {
    animation-play-state: paused;
}

@keyframes certScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.cert-card {
    flex-shrink: 0;
    width: 260px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition);
    background: #fff;
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.cert-img {
    width: 100%;
    height: 340px;
    overflow: hidden;
    flex-shrink: 0;
}

.cert-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.cert-tag {
    text-align: center;
    padding: 12px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.cert-tag.tag-green {
    color: #10b981;
}

/* ========== 为什么选择我们 ========== */
.advantages {
    padding: 80px 0;
    background: var(--bg-white);
}

.advantage-main {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    border-radius: var(--radius-xl);
    padding: 48px;
    color: #fff;
    text-align: center;
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
}

.advantage-main::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.advantage-main::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

.advantage-main-label {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.8;
    margin-bottom: 16px;
    position: relative;
}

.advantage-quote {
    position: relative;
    margin-bottom: 24px;
}

.quote-mark {
    font-size: 60px;
    line-height: 1;
    opacity: 0.3;
    font-family: Georgia, serif;
}

.advantage-main-title {
    font-size: 28px;
    font-weight: 700;
    margin-top: -20px;
    position: relative;
}

.advantage-tags {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    position: relative;
}

.adv-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    padding: 10px 20px;
    border-radius: var(--radius);
    backdrop-filter: blur(4px);
}

.adv-tag-icon {
    font-size: 14px;
}

.adv-tag-label {
    font-weight: 600;
    font-size: 15px;
}

.adv-tag-text {
    font-size: 13px;
    opacity: 0.8;
}

.advantage-main-desc {
    font-size: 16px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 24px;
    line-height: 1.7;
    position: relative;
}

.advantage-pills {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
    flex-wrap: wrap;
    position: relative;
}

.pill {
    background: rgba(255,255,255,0.2);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 13px;
    backdrop-filter: blur(4px);
}

.advantage-cases {
    display: flex;
    justify-content: center;
    gap: 16px;
    position: relative;
}

.advantage-cases .btn-outline {
    border-color: rgba(255,255,255,0.5);
    color: #fff;
}

.advantage-cases .btn-outline:hover {
    background: rgba(255,255,255,0.15);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.advantage-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--bg-white);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.advantage-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.adv-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.adv-icon-blue {
    background: #eff6ff;
    color: var(--accent-blue);
}

.adv-icon-orange {
    background: #fffbeb;
    color: var(--accent-orange);
}

.adv-icon-purple {
    background: #f5f3ff;
    color: var(--accent-purple);
}

.adv-icon-green {
    background: #ecfdf5;
    color: var(--accent-green);
}

.adv-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
    text-align: center;
}

.adv-card-subtitle {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 4px;
    text-align: center;
}

.adv-card-time {
    font-size: 13px;
    color: var(--accent-orange);
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.adv-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: center;
}

/* 品质保证 */
.promise-section {
    text-align: center;
    padding: 80px 0;
    background: #fff;
}

.promise-title {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary);
    margin-bottom: 8px;
}

.promise-subtitle {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
}

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

.promise-card {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

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

.promise-icon {
    margin-bottom: 16px;
}

.promise-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.promise-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 更多核心功能 ========== */
.more-features {
    padding: 80px 0;
    background: var(--bg-gray);
}

/* ========== 核心功能 ========== */
.features {
    padding: 80px 0;
    background: var(--bg-gray);
}

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

.feature-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-card-highlight {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(180deg, #faf5ff 0%, #ffffff 100%);
}

.feature-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 100px;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 0;
}

.feature-check {
    color: var(--accent-green);
    font-weight: 700;
    font-size: 16px;
}

/* ========== 定价方案 ========== */
.pricing {
    display: none;
    padding: 80px 0;
    background: var(--bg-gray);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.pricing-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.pricing-card-popular {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--primary);
    background: linear-gradient(180deg, #faf5ff 0%, #ffffff 100%);
    transform: scale(1.03);
}

.pricing-card-popular:hover {
    transform: scale(1.03) translateY(-4px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 24px;
    border-radius: 100px;
    white-space: nowrap;
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.pricing-name {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.pricing-unit {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
}

.pricing-original {
    font-size: 16px;
    color: var(--text-light);
    text-decoration: line-through;
    margin-right: 4px;
}

.pricing-type {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

.pricing-card .btn {
    margin-bottom: 24px;
}

.pricing-features {
    list-style: none;
    flex: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-check {
    color: var(--accent-green);
    font-weight: 700;
}

.pricing-extra {
    color: var(--accent-orange) !important;
    font-weight: 500;
}

.pricing-notes {
    text-align: center;
    font-size: 13px;
    color: var(--text-light);
}

.pricing-notes p {
    margin-bottom: 4px;
}

.pricing-notes .link {
    color: var(--primary);
    text-decoration: underline;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    max-width: 400px;
}

.footer-brand .logo-img {
    height: 28px;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 8px;
}

.footer-slogan {
    font-size: 14px;
}

.footer-qr {
    text-align: center;
}

.qr-img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.qr-text {
    font-size: 13px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ========== 滚动动画 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto 32px;
    }

    .pricing-card-popular {
        transform: none;
    }

    .pricing-card-popular:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }

    .logo-img {
        height: 48px;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-title {
        font-size: 32px;
    }

    .highlight-number {
        font-size: 40px;
    }

    .highlight-text {
        font-size: 16px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .section-title {
        font-size: 26px;
    }

    .advantage-main {
        padding: 32px 20px;
    }

    .advantage-main-title {
        font-size: 22px;
    }

    .advantage-tags {
        gap: 12px;
    }

    .adv-tag {
        padding: 8px 14px;
    }

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

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

    .footer-inner {
        flex-direction: column;
        gap: 32px;
        align-items: center;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .cert-card {
        width: 200px;
    }

    .cert-img {
        height: 260px;
    }

    .cert-card img {
        height: 260px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .highlight-number {
        font-size: 32px;
    }

    .hero-highlight {
        flex-direction: column;
        gap: 4px;
        align-items: center;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .advantage-pills {
        gap: 8px;
    }

    .pill {
        font-size: 12px;
        padding: 4px 12px;
    }

    .advantage-cases {
        flex-direction: column;
        align-items: center;
    }
}

/* ========== 悬浮客服按钮 ========== */
.float-service {
    position: fixed;
    right: 24px;
    bottom: 120px;
    z-index: 999;
}

.float-service-tip-text {
    position: absolute;
    right: 70px;
    bottom: 50%;
    transform: translateY(50%);
    white-space: nowrap;
    background: #fff;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    font-size: 14px;
    font-weight: 500;
    opacity: 1;
    visibility: visible;
    transition: var(--transition);
}

.float-service-tip-text::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 8px solid #fff;
}

.float-service:hover .float-service-tip-text {
    opacity: 0;
    visibility: hidden;
}

.float-service-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transition: var(--transition);
}

.float-service-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
}

.float-service-btn svg {
    margin-bottom: 2px;
}

.float-service-btn span {
    font-size: 11px;
    font-weight: 500;
}

.float-service-panel {
    position: absolute;
    right: 70px;
    bottom: 0;
    width: 220px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: var(--transition);
}

.float-service:hover .float-service-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.float-service-header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    font-weight: 500;
}

.float-service-body {
    padding: 20px;
    text-align: center;
}

.float-service-qrcode {
    width: 140px;
    height: 140px;
    margin: 0 auto 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.float-service-qrcode img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.float-service-tip {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 4px;
}

.float-service-time {
    font-size: 12px;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .float-service {
        right: 16px;
        bottom: 80px;
    }

    .float-service-btn {
        width: 48px;
        height: 48px;
    }

    .float-service-btn svg {
        width: 20px;
        height: 20px;
    }

    .float-service-panel {
        right: 60px;
        width: 200px;
    }

    .float-service-tip-text {
        right: 60px;
        font-size: 12px;
        padding: 6px 12px;
    }
}