/* ====================================================
   公共样式表 — Zoho企业邮箱全站共用
   ==================================================== */

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    font-family: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #F5F7FA;
    color: #1A2332;
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

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

:root {
    --primary: #1E88E5;
    --primary-dark: #1565C0;
    --primary-light: #E3F2FD;
    --primary-gradient: linear-gradient(135deg, #1E88E5 0%, #1565C0 100%);
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.2, 0.95, 0.4, 1);
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1680px;
    margin: 0 auto;
    padding: 0 60px;
}

.section-padding {
    padding: 80px 0;
}

.section-title {
    font-size: 2.6rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.03em;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.section-title .highlight {
    color: var(--primary);
    font-weight: 700;
}

.section-sub {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--gray-500);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 56px;
    line-height: 1.7;
}

@media (max-width: 1400px) {
    .container { padding: 0 40px; }
}
@media (max-width: 1200px) {
    .container { padding: 0 32px; }
}
@media (max-width: 768px) {
    .section-padding { padding: 48px 0; }
    .section-title { font-size: 2rem; }
    .section-sub { font-size: 1rem; margin-bottom: 32px; }
    .container { padding: 0 20px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
}

/* ====================================================
   导航栏
   ==================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    padding: 14px 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

.logo img {
    height: 58px;
    width: auto;
    display: block;
}

.logo .tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 12px;
    border-radius: 40px;
    border: 1px solid rgba(30, 136, 229, 0.12);
    white-space: nowrap;
}

.nav {
    display: flex;
    gap: 36px;
    align-items: center;
}

.nav a {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    transition: color 0.2s;
    position: relative;
}

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

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

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

.nav .btn-nav {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 8px 28px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.nav .btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(30, 136, 229, 0.30);
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--gray-700);
    cursor: pointer;
}

@media (max-width: 992px) {
    .nav { gap: 24px; }
    .nav a { font-size: 13px; }
}

@media (max-width: 820px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px 24px;
        gap: 14px;
        box-shadow: 0 20px 48px rgba(0,0,0,0.08);
        border-top: 1px solid var(--gray-200);
    }
    .nav.open { display: flex; }
    .nav a::after { display: none; }
    .nav .btn-nav { width: 100%; text-align: center; padding: 10px; }
    .menu-btn { display: block; }
}

.main-content {
    padding-top: 82px;
}

/* ====================================================
   页面横幅
   ==================================================== */
.page-banner {
    background: linear-gradient(135deg, #E3F2FD 0%, #F5F7FA 50%, #FFFFFF 100%);
    padding: 50px 0 40px;
    border-bottom: 1px solid var(--gray-200);
}

.page-banner .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.page-banner .breadcrumb {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.page-banner .breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.page-banner .breadcrumb a:hover {
    text-decoration: underline;
}

.page-banner h1 {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    color: var(--gray-900);
}

.page-banner h1 span {
    color: var(--primary);
}

.page-banner p {
    font-size: 1.15rem;
    color: var(--gray-500);
    max-width: 700px;
    margin-top: 8px;
}

@media (max-width: 768px) {
    .page-banner { padding: 32px 0 24px; }
    .page-banner h1 { font-size: 2rem; }
}

/* ====================================================
   联系表单
   ==================================================== */
.cta-section {
    background: var(--primary-gradient);
    color: #fff;
    text-align: center;
    padding: 56px 0 48px;
    border-radius: 0;
    margin: 0;
}

.cta-section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.cta-section .sub {
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.85;
    margin-bottom: 28px;
}

.cta-form {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    padding: 32px 40px 28px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    text-align: left;
}

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

.cta-form .form-group {
    margin-bottom: 14px;
}

.cta-form .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 4px;
}

.cta-form .form-group label .req {
    color: #FCA5A5;
    margin-left: 2px;
}

.cta-form .form-group input,
.cta-form .form-group textarea,
.cta-form .form-group select {
    width: 100%;
    padding: 11px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.cta-form .form-group input::placeholder,
.cta-form .form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.cta-form .form-group input:focus,
.cta-form .form-group textarea:focus,
.cta-form .form-group select:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.cta-form .form-group select option {
    color: #1A2332;
    background: #fff;
}

.cta-form .form-group textarea {
    min-height: 68px;
    resize: vertical;
}

.cta-form .btn-submit {
    background: #fff;
    color: var(--primary);
    border: none;
    padding: 13px 28px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 6px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.10);
}

.cta-form .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

.cta-form .btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.cta-form .hint {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
    margin-top: 12px;
}

.cta-form .hint i {
    margin-right: 4px;
}

.cta-trust {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 28px;
    font-size: 13px;
    font-weight: 400;
    opacity: 0.8;
    flex-wrap: wrap;
}

.cta-trust span {
    display: flex;
    align-items: center;
    gap: 6px;
}

@media (max-width: 992px) {
    .cta-form .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .cta-section {
        padding: 40px 0 32px;
    }
    .cta-section h2 {
        font-size: 1.6rem;
    }
    .cta-section .sub {
        font-size: 0.95rem;
    }
    .cta-form {
        padding: 20px 18px;
    }
    .cta-form .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .cta-trust {
        gap: 12px 20px;
        font-size: 12px;
    }
}

/* ====================================================
   页尾
   ==================================================== */
.footer {
    background: var(--gray-900);
    color: rgba(255, 255, 255, 0.5);
    padding: 44px 0 24px;
}

.footer .container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 10px;
}

.footer a {
    color: rgba(255, 255, 255, 0.45);
    font-size: 14px;
    font-weight: 400;
    line-height: 2.2;
    display: block;
    transition: color 0.2s;
}

.footer a:hover {
    color: #fff;
}

.footer .brand {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.footer .brand .highlight {
    color: var(--primary);
}

.footer .brand-desc {
    font-size: 14px;
    font-weight: 400;
    max-width: 280px;
    line-height: 1.7;
}

.footer .contact-info {
    font-size: 14px;
    font-weight: 400;
    margin-top: 8px;
}

.footer .contact-info i {
    color: var(--primary);
    margin-right: 6px;
}

.footer .bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 20px;
    margin-top: 12px;
    text-align: center;
    font-size: 13px;
    font-weight: 400;
}

.footer .bottom a {
    display: inline;
    margin: 0 6px;
}

@media (max-width: 992px) {
    .footer .container {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}
@media (max-width: 480px) {
    .footer .container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ====================================================
   模态框
   ==================================================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-box {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 28px 32px 36px;
    max-width: 360px;
    width: 90%;
    text-align: center;
    position: relative;
    animation: modalIn 0.3s ease;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.15);
}

@keyframes modalIn {
    from {
        transform: scale(0.92) translateY(12px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.modal-box .close {
    position: absolute;
    top: 10px;
    right: 14px;
    font-size: 22px;
    color: var(--gray-400);
    cursor: pointer;
    background: none;
    border: none;
}

.modal-box .close:hover {
    color: var(--gray-800);
}

.modal-box h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.modal-box img {
    max-width: 180px;
    margin: 0 auto;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

.modal-box .hint {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-500);
    margin-top: 10px;
}

/* ====================================================
   浮动按钮
   ==================================================== */
.float-bar {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.float-bar .btn {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 11px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 8px 28px rgba(30, 136, 229, 0.25);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.float-bar .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(30, 136, 229, 0.35);
}

.float-bar .btn.wx {
    background: #07c160;
    box-shadow: 0 8px 28px rgba(7, 193, 96, 0.25);
}

.float-bar .btn.wx:hover {
    box-shadow: 0 12px 40px rgba(7, 193, 96, 0.35);
}

@media (max-width: 600px) {
    .float-bar .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    .float-bar .btn span {
        display: none;
    }
}

/* ===== Toast 提示 ===== */
.toast {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-80px);
    background: #1E293B;
    color: #fff;
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 500;
    font-size: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.2, 0.95, 0.4, 1);
    z-index: 9999;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: #059669;
}

.toast.error {
    background: #DC2626;
}

/* ====================================================
   6大核心功能（通用）
   ==================================================== */
.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.why-card {
    padding: 36px 24px 32px;
    text-align: center;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    background: #fff;
}

.why-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

.why-card .icon {
    font-size: 38px;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}

.why-card h4 {
    font-size: 19px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.why-card p {
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .why-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .why-grid { grid-template-columns: 1fr; }
    .why-card { padding: 24px 18px; }
    .why-card h4 { font-size: 17px; }
    .why-card p { font-size: 14px; }
}

/* ====================================================
   配套增值服务（通用）
   ==================================================== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 32px 24px 28px;
    border: 1px solid var(--gray-200);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
    border-color: var(--primary);
}

.service-card .icon {
    font-size: 32px;
    color: var(--primary);
    display: block;
    margin-bottom: 10px;
}

.service-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.service-card p {
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .service-grid { grid-template-columns: 1fr; max-width: 480px; }
    .service-card h4 { font-size: 16px; }
    .service-card p { font-size: 14px; }
}

/* ====================================================
   4步开通流程（通用）
   ==================================================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.step-item {
    text-align: center;
    padding: 20px;
}

.step-item .num {
    display: inline-block;
    width: 44px;
    height: 44px;
    line-height: 44px;
    background: var(--primary-gradient);
    color: #fff;
    border-radius: 50%;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 10px;
}

.step-item h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.step-item p {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
}
@media (max-width: 480px) {
    .steps-grid { grid-template-columns: 1fr; }
    .step-item h4 { font-size: 15px; }
    .step-item p { font-size: 13px; }
}

/* ====================================================
   安全网格（通用）
   ==================================================== */
.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.security-item {
    text-align: center;
    padding: 24px 20px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.security-item:hover {
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

.security-item .icon {
    font-size: 34px;
    color: var(--primary);
    display: block;
    margin-bottom: 10px;
}

.security-item h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.security-item p {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .security-grid { grid-template-columns: 1fr; gap: 12px; }
}

/* ====================================================
   客户评价（通用）
   ==================================================== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 32px 28px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.testimonial-card:hover {
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

.testimonial-card .badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 14px;
    border-radius: 40px;
    margin-bottom: 8px;
}

.testimonial-card .quote {
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-600);
    font-style: italic;
    line-height: 1.8;
}

.testimonial-card .author {
    margin-top: 12px;
    font-weight: 600;
    color: var(--gray-800);
    font-size: 15px;
}

.testimonial-card .title {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-400);
}

@media (max-width: 768px) {
    .testimonial-grid { grid-template-columns: 1fr; }
    .testimonial-card { padding: 24px 20px; }
    .testimonial-card .quote { font-size: 14px; }
}

/* ====================================================
   FAQ（通用）
   ==================================================== */
.faq-accordion {
    max-width: 1200px;
    margin: 0 auto;
    border-top: 1px solid var(--gray-200);
}

.faq-accordion .faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-accordion .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
    gap: 20px;
}

.faq-accordion .faq-question:hover {
    color: var(--primary);
}

.faq-accordion .faq-question .q-text {
    font-size: 17px;
    font-weight: 600;
    color: var(--gray-800);
    transition: color 0.2s;
}

.faq-accordion .faq-question:hover .q-text {
    color: var(--primary);
}

.faq-accordion .faq-question .q-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: transform 0.3s ease;
    font-size: 14px;
}

.faq-accordion .faq-item.active .faq-question .q-icon {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-accordion .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.2, 0.95, 0.4, 1), padding 0.3s ease;
    padding: 0;
}

.faq-accordion .faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 0 20px 0;
}

.faq-accordion .faq-answer .a-text {
    font-size: 16px;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.8;
    padding-right: 20px;
}

.faq-accordion .faq-answer .a-text code {
    background: var(--gray-100);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 14px;
    color: var(--gray-700);
}

.faq-more {
    text-align: center;
    margin-top: 36px;
}

.faq-more a {
    color: var(--primary);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

.faq-more a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .faq-accordion .faq-question .q-text { font-size: 15px; }
    .faq-accordion .faq-answer .a-text { font-size: 14px; padding-right: 0; }
}

/* ====================================================
   产品功能演示（通用）
   ==================================================== */
.demo-grid {
    display: flex;
    flex-direction: column;
    gap: 72px;
    width: 100%;
}

.demo-item {
    display: flex;
    align-items: center;
    gap: 64px;
    width: 100%;
}

.demo-item:nth-child(even) {
    flex-direction: row-reverse;
}

.demo-text {
    flex: 1;
    min-width: 0;
    padding: 0 8px;
}

.demo-text .label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 10px;
}

.demo-text h3 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.demo-text h3 .highlight {
    color: var(--primary);
    font-weight: 500;
}

.demo-text p {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--gray-500);
    line-height: 1.8;
    max-width: 480px;
}

.demo-text .feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.demo-text .feature-tags span {
    font-size: 12px;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--gray-50);
    padding: 4px 14px;
    border-radius: 40px;
    border: 1px solid var(--gray-200);
}

.demo-text .feature-tags span i {
    color: var(--primary);
    margin-right: 4px;
    font-size: 11px;
}

.demo-video {
    flex: 1;
    min-width: 0;
    border: none;
    border-radius: 0;
    overflow: hidden;
    background: #ffffff;
    aspect-ratio: 16 / 9;
    position: relative;
    cursor: pointer;
    line-height: 0;
}

.demo-video video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background: #ffffff;
    vertical-align: bottom;
}

.demo-video img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background: #ffffff;
    vertical-align: bottom;
}

.demo-video .play-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 52px;
    height: 52px;
    background: rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.demo-video .play-indicator i {
    font-size: 20px;
    color: var(--primary);
    margin-left: 3px;
}

.demo-video:hover .play-indicator {
    opacity: 1;
}

@media (max-width: 1200px) {
    .demo-item, .demo-item:nth-child(even) {
        flex-direction: column;
        gap: 28px;
        text-align: center;
    }
    .demo-text p { max-width: 100%; margin: 0 auto; }
    .demo-text .feature-tags { justify-content: center; }
    .demo-text h3 { font-size: 1.6rem; }
    .demo-video { width: 100%; max-width: 640px; aspect-ratio: 16 / 9; }
}

.demo-item-streams {
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    max-width: 100vw;
    background: #F5F7FA;
    padding: 40px 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
}

.demo-item-streams .streams-inner {
    max-width: 1680px;
    width: 100%;
    padding: 0 60px;
    display: flex;
    align-items: center;
    gap: 48px;
}

.demo-item-streams .demo-text {
    flex: 1;
    padding: 0 8px;
}

.demo-item-streams .demo-video {
    flex: 0 0 560px;
    width: 560px;
    height: 560px;
    aspect-ratio: auto;
    background: transparent;
    border-radius: 12px;
    overflow: hidden;
    cursor: default;
}

.demo-item-streams .demo-video img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: transparent;
    border-radius: 12px;
}

.demo-item-streams .demo-video .play-indicator {
    display: none;
}

@media (max-width: 1400px) {
    .demo-item-streams .streams-inner { padding: 0 40px; }
    .demo-item-streams .demo-video { flex: 0 0 480px; width: 480px; height: 480px; }
}

@media (max-width: 1200px) {
    .demo-item-streams { padding: 32px 0; }
    .demo-item-streams .streams-inner {
        padding: 0 20px;
        flex-direction: column;
        gap: 28px;
    }
    .demo-item-streams .demo-video {
        flex: none;
        width: 100%;
        max-width: 480px;
        height: auto;
        aspect-ratio: 1 / 1;
        border-radius: 12px;
    }
}

@media (max-width: 600px) {
    .demo-grid { gap: 40px; }
    .demo-text h3 { font-size: 1.3rem; }
    .demo-text p { font-size: 0.95rem; }
    .demo-text .feature-tags span { font-size: 11px; padding: 3px 10px; }
    .demo-item-streams .streams-inner { padding: 0 16px; }
    .demo-item-streams .demo-video { max-width: 100%; }
}

/* ====================================================
   价格方案（通用）
   ==================================================== */
.price-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.price-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 24px 32px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.price-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
}

.price-card.popular {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(30, 136, 229, 0.08);
}

.price-card.popular .pop-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 22px;
    border-radius: 40px;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.price-card .plan-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.3;
}

.price-card .plan-name .badge-region {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    padding: 0 10px;
    border-radius: 40px;
    margin-left: 6px;
    vertical-align: middle;
}

.price-card .plan-price {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--primary);
    margin: 8px 0 2px;
    line-height: 1.2;
}

.price-card .plan-price small {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--gray-500);
}

.price-card .plan-desc {
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-500);
    margin-bottom: 8px;
}

.price-card .plan-storage {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 2px 18px;
    border-radius: 40px;
    margin-bottom: 10px;
    align-self: flex-start;
}

.price-card ul {
    list-style: none;
    padding: 0;
    margin: 0 0 16px;
    flex: 1;
}

.price-card ul li {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-600);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--gray-100);
}

.price-card ul li:last-child {
    border-bottom: none;
}

.price-card ul li i {
    color: var(--primary);
    font-size: 14px;
    flex-shrink: 0;
}

.price-card .btn-price {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 11px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin-top: auto;
}

.price-card .btn-price:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30, 136, 229, 0.20);
}

.price-note {
    text-align: center;
    margin-top: 28px;
    font-size: 15px;
    font-weight: 400;
    color: var(--gray-500);
}

.price-note a {
    color: var(--primary);
    font-weight: 500;
}

@media (max-width: 1200px) {
    .price-grid { grid-template-columns: repeat(2, 1fr); max-width: 800px; }
}
@media (max-width: 600px) {
    .price-grid { grid-template-columns: 1fr; max-width: 400px; }
    .price-card { padding: 24px 18px; }
    .price-card .plan-price { font-size: 2.2rem; }
}