/* ==========================================
   styles.css - 嘉兴湖州外贸出海顾问网站
   ========================================== */

/* === CSS Variables === */
:root {
    --color-primary: #FF6A00;
    --color-primary-dark: #E05A00;
    --color-primary-light: #FFF0E5;
    --color-dark: #1A1A2E;
    --color-dark-secondary: #16213E;
    --color-text: #2D3436;
    --color-text-light: #636E72;
    --color-text-white: #FFFFFF;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8F9FA;
    --color-bg-dark: #1A1A2E;
    --color-border: #E9ECEF;
    --color-success: #00B894;
    --color-warning: #FDCB6E;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --max-width: 1200px;
    --nav-height: 72px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* === Section Common === */
.section { padding: 100px 0; }
.section-alt { background: var(--color-bg-alt); }

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

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

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: -0.3px;
}

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

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: 8px;
    transition: var(--transition);
}

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

.nav-cta {
    background: var(--color-primary);
    color: white !important;
    padding: 10px 22px !important;
    border-radius: 25px;
    font-weight: 600;
    margin-left: 8px;
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255, 106, 0, 0.35);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-dark) 0%, #252545 50%, #1a1a35 100%);
    overflow: hidden;
    margin-top: 0;
    padding: 140px 0 100px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 106, 0, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 25px;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    color: white;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-primary) 0%, #FF8533 50%, #FFB380 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 6px 24px rgba(255, 106, 0, 0.4);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 32px rgba(255, 106, 0, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
}

.hero-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 6px;
}

/* === Trust Bar === */
.trust-bar {
    background: var(--color-dark-secondary);
    padding: 16px 0;
    overflow: hidden;
}

.trust-items {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
}

.trust-item i { color: var(--color-success); font-size: 16px; }

/* === About Section === */
.about-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 60px;
    align-items: start;
}

.about-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 40px 30px;
    text-align: center;
    position: sticky;
    top: 100px;
}

.about-avatar { display: flex; flex-direction: column; align-items: center; gap: 20px; }

.avatar-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary-light), #FFE0CC);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-primary);
}

.avatar-info h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.avatar-info p {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 12px;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-orange {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.about-text-block { margin-bottom: 28px; }

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

.about-features { display: flex; flex-direction: column; gap: 16px; }

.about-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.about-feature:hover { background: var(--color-primary-light); }

.about-feature i {
    font-size: 22px;
    color: var(--color-primary);
    margin-top: 3px;
    flex-shrink: 0;
}

.about-feature div { display: flex; flex-direction: column; gap: 2px; }

.about-feature strong {
    font-size: 15px;
    color: var(--color-dark);
}

.about-feature span {
    font-size: 14px;
    color: var(--color-text-light);
}

/* === Services Section === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 26px;
    color: var(--color-primary);
}

.service-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* === Why Alibaba Section === */
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.why-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.why-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.why-label {
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: 500;
}

.why-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.why-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
}

.why-feature-item:hover { background: var(--color-primary-light); }

.why-feature-item i {
    font-size: 18px;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* === Coverage Section === */
.coverage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.coverage-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.coverage-map-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 24px;
    color: white;
    box-shadow: 0 4px 15px rgba(255, 106, 0, 0.35);
}

.coverage-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.coverage-card > p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.coverage-list { display: flex; flex-wrap: wrap; gap: 8px; }

.coverage-list li {
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* === Process Section === */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
    padding: 0 20px;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    position: relative;
    z-index: 2;
    box-shadow: 0 4px 16px rgba(255, 106, 0, 0.35);
}

.step-connector {
    position: absolute;
    top: 28px;
    left: calc(50% + 28px);
    width: calc(100% - 56px);
    height: 2px;
    background: var(--color-border);
    z-index: 1;
}

.process-step:last-child .step-connector { display: none; }

.process-step h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--color-text-light);
}

/* === FAQ Section === */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover { border-color: #D0D5DD; }

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
    text-align: left;
    gap: 16px;
    transition: var(--transition);
    font-family: inherit;
}

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

.faq-question i { transition: transform 0.3s ease; color: var(--color-text-light); font-size: 14px; flex-shrink: 0; }

.faq-question[aria-expanded="true"] i { transform: rotate(180deg); color: var(--color-primary); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-answer p {
    padding: 0 24px;
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
}

.faq-item.active .faq-answer { max-height: 300px; }

.faq-item.active .faq-answer p { padding: 0 24px 20px; }

.faq-item.active { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }

/* === CTA Section === */
.cta-card {
    background: linear-gradient(135deg, var(--color-dark) 0%, #252545 100%);
    border-radius: var(--radius-xl);
    padding: 64px 40px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 106, 0, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-card h2 {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
    position: relative;
}

.cta-card > p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    position: relative;
}

.cta-contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
    position: relative;
}

.cta-contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    color: white;
    transition: var(--transition);
    text-align: left;
    cursor: pointer;
}

.cta-contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.cta-contact-item i { font-size: 22px; color: var(--color-primary); flex-shrink: 0; }

.cta-contact-item strong { display: block; font-size: 15px; margin-bottom: 2px; }

.cta-contact-item span { display: block; font-size: 14px; color: rgba(255, 255, 255, 0.65); }

.cta-note {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.55);
    position: relative;
}

/* === Footer === */
.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.footer-brand p { font-size: 14px; line-height: 1.8; }

.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: white;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
    transition: var(--transition);
}

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

.footer-col a i { width: 18px; margin-right: 4px; }

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-disclaimer { margin-top: 8px; font-size: 12px; }

/* === Hero outline button === */
.btn-outline-light {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; font-size: 16px; font-weight: 600;
    border-radius: 50px; cursor: pointer; transition: var(--transition);
    background: transparent; color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: white; transform: translateY(-2px);
}

.btn-outline-dark {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px; font-size: 15px; font-weight: 600;
    border-radius: 50px; cursor: pointer; transition: var(--transition);
    background: transparent; color: var(--color-dark);
    border: 2px solid var(--color-border); margin-top: 8px;
}
.btn-outline-dark:hover { border-color: var(--color-dark); background: var(--color-bg-alt); }
.btn-full { width: 100%; justify-content: center; }

/* === Lead Modal === */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.active { opacity: 1; visibility: visible; }

.modal-box {
    background: white; border-radius: var(--radius-xl);
    padding: 40px 36px; width: 100%; max-width: 520px;
    max-height: 90vh; overflow-y: auto;
    position: relative;
    transform: translateY(24px) scale(0.97);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-xl);
}
.modal-overlay.active .modal-box { transform: translateY(0) scale(1); }

.modal-close {
    position: absolute; top: 16px; right: 16px;
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--color-bg-alt); border: none; cursor: pointer;
    font-size: 16px; color: var(--color-text-light);
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.modal-close:hover { background: var(--color-border); color: var(--color-dark); }

.modal-header { text-align: center; margin-bottom: 28px; }
.modal-icon {
    width: 56px; height: 56px; border-radius: 16px;
    background: var(--color-primary-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: var(--color-primary);
    margin: 0 auto 16px;
}
.modal-header h2 { font-size: 22px; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; }
.modal-header p { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

.form-section-label {
    font-size: 12px; font-weight: 600; color: var(--color-text-light);
    text-transform: uppercase; letter-spacing: 0.8px; margin: 20px 0 10px;
}
.form-section-label:first-of-type { margin-top: 0; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 14px; font-weight: 500; color: var(--color-dark); }
.required { color: var(--color-primary); }
.optional { font-size: 12px; color: var(--color-text-light); font-weight: 400; }

.form-group input,
.form-group select {
    padding: 11px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px; color: var(--color-text);
    font-family: var(--font-sans);
    background: white; transition: border-color 0.2s ease;
    outline: none; width: 100%;
}
.form-group input:focus,
.form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.1);
}
.form-group input.error,
.form-group select.error { border-color: #E53E3E; }
.form-group input::placeholder { color: #AAAAAA; }

.form-privacy { text-align: center; font-size: 12px; color: var(--color-text-light); margin-top: 12px; }

.modal-success {
    display: flex; flex-direction: column; align-items: center;
    text-align: center; padding: 20px 0; gap: 12px;
}
.success-icon { font-size: 56px; color: var(--color-success); line-height: 1; }
.modal-success h3 { font-size: 22px; font-weight: 700; color: var(--color-dark); }
.modal-success p { font-size: 15px; color: var(--color-text-light); line-height: 1.8; }
.success-contact {
    display: flex; align-items: center; gap: 10px;
    background: var(--color-bg-alt); padding: 12px 20px;
    border-radius: var(--radius-md); font-size: 14px; color: var(--color-text-light); margin: 4px 0;
}
.success-contact a { color: var(--color-primary); font-weight: 600; display: flex; align-items: center; gap: 6px; }

@media (max-width: 480px) {
    .modal-box { padding: 28px 20px; }
    .form-row { grid-template-columns: 1fr; }
    .modal-header h2 { font-size: 19px; }
}

/* === Scroll to top === */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 16px rgba(255, 106, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 900;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255, 106, 0, 0.5); }

/* === Toast === */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-dark);
    color: white;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    z-index: 2000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
    box-shadow: var(--shadow-lg);
}

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

.toast.success { border: 2px solid var(--color-success); }

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-in { animation: fadeInUp 0.6s ease forwards; }

/* === Responsive: Tablet === */
@media (max-width: 1024px) {
    .hero-title { font-size: 42px; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .why-features { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); gap: 40px 0; }
    .process-step:nth-child(2) .step-connector { display: none; }
    .cta-contact-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto 28px; }
}

/* === Responsive: Mobile === */
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-header h2 { font-size: 28px; }
    .section-desc { font-size: 15px; }

    /* Nav */
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        z-index: 999;
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-link { display: block; padding: 14px 16px; text-align: center; }
    .nav-cta { margin-left: 0; margin-top: 8px; }

    /* Hero */
    .hero { padding: 120px 0 60px; min-height: auto; }
    .hero-title { font-size: 30px; }
    .hero-subtitle { font-size: 15px; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .stat-number { font-size: 30px; }
    .hero-cta-group { flex-direction: column; align-items: center; }

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

    /* Services */
    .services-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }

    /* Why */
    .why-features { grid-template-columns: 1fr; }

    /* Coverage */
    .coverage-grid { grid-template-columns: 1fr; }

    /* Process */
    .process-steps { grid-template-columns: 1fr; }
    .step-connector { display: none !important; }

    /* CTA */
    .cta-card { padding: 40px 24px; }
    .cta-card h2 { font-size: 24px; }

    /* Footer */
    .footer-content { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
}

/* === Business Cards === */
.about-card-wrap {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 100px;
}

.biz-card {
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: var(--shadow-lg);
}

/* 红色数字名片 */
.biz-card-red {
    background: linear-gradient(135deg, #E8201A 0%, #FF6A00 100%);
    color: white;
    min-height: 130px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.biz-card-name {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.biz-card-title {
    font-size: 14px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 10px;
}

.biz-card-cert {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255,255,255,0.2);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 13px;
}

.biz-card-cert i { color: #4FC3F7; }

.biz-card-phone {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-top: 20px;
}

/* 白色实体名片 */
.biz-card-white {
    background: white;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.biz-card-white-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.biz-card-name-dark {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 4px;
    margin-bottom: 4px;
}

.biz-card-title-dark {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: 2px;
}

.biz-card-title-en {
    font-size: 11px;
    color: var(--color-text-light);
}

.biz-card-logo { flex-shrink: 0; }

.alibaba-logo-text {
    font-size: 18px;
    font-weight: 800;
    color: #E8201A;
    font-style: italic;
}

.alibaba-logo-text span { font-size: 13px; }

.biz-card-phone-dark {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    border-top: 2px solid #FF6A00;
    padding-top: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.biz-card-phone-dark i { color: var(--color-primary); }

/* === Offices Block === */
.offices-block {
    margin-top: 24px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 20px;
}

.offices-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.offices-title i { color: var(--color-primary); }

.offices-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.office-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 12px;
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.office-item strong {
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 700;
}

.office-item span {
    font-size: 12px;
    color: var(--color-text-light);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .about-card-wrap { position: static; }
    .offices-grid { grid-template-columns: 1fr; }
    .biz-card-white-header { flex-direction: column; }
}

/* === AI Power Section === */
.ai-power { background: var(--color-bg); }

.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.ai-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), #FF8533);
    opacity: 0;
    transition: var(--transition);
}

.ai-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.ai-card:hover::before { opacity: 1; }

.ai-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--color-primary-light), #FFE0CC);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: var(--color-primary);
    margin-bottom: 16px;
}

.ai-card h3 { font-size: 17px; font-weight: 700; color: var(--color-dark); margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

.ai-cta {
    text-align: center;
    padding: 40px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.ai-cta p { font-size: 17px; color: var(--color-text); margin-bottom: 20px; font-weight: 500; }

/* === Cases Section === */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 16px;
}

.case-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.case-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
}

.case-industry, .case-location {
    display: flex; align-items: center; gap: 6px;
    font-size: 13px; font-weight: 500;
}

.case-industry { color: var(--color-primary); }
.case-location { color: var(--color-text-light); }

.case-title { font-size: 17px; font-weight: 700; color: var(--color-dark); margin-bottom: 10px; }
.case-desc { font-size: 14px; color: var(--color-text-light); line-height: 1.7; margin-bottom: 20px; }

.case-results { display: flex; gap: 16px; flex-wrap: wrap; }

.case-result-item { display: flex; flex-direction: column; align-items: center; }

.result-number { font-size: 28px; font-weight: 800; color: var(--color-primary); line-height: 1; }
.result-label { font-size: 12px; color: var(--color-text-light); margin-top: 4px; }

.cases-note { text-align: center; font-size: 13px; color: var(--color-text-light); margin-top: 16px; }

/* === Articles Section === */
.articles { background: var(--color-bg); }

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.article-card {
    display: block;
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    color: inherit;
}

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

.article-tag {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 12px; font-weight: 600;
    padding: 4px 10px; border-radius: 12px;
    margin-bottom: 12px;
}

.article-card h3 { font-size: 16px; font-weight: 700; color: var(--color-dark); margin-bottom: 10px; line-height: 1.5; }
.article-card p { font-size: 13px; color: var(--color-text-light); line-height: 1.7; margin-bottom: 16px; }

.article-meta {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 13px; color: var(--color-text-light);
}

.article-read { color: var(--color-primary); font-weight: 600; }

.articles-more {
    text-align: center;
    padding: 40px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.articles-more > p { font-size: 16px; font-weight: 500; color: var(--color-text); margin-bottom: 24px; }

.social-follow {
    display: flex; gap: 32px; justify-content: center; flex-wrap: wrap;
}

.social-follow-item {
    display: flex; align-items: center; gap: 10px;
    font-size: 15px; color: var(--color-text);
}

.social-follow-item i { font-size: 22px; color: var(--color-primary); }

/* QR Code Block */
.qr-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: 28px;
}

.qr-img {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-md);
    border: 4px solid white;
    box-shadow: var(--shadow-md);
    object-fit: cover;
}

.qr-label {
    font-size: 14px;
    color: var(--color-text-light);
    text-align: center;
    line-height: 1.6;
    margin: 0;
}

.qr-label strong { color: var(--color-dark); }

/* Footer QR popup on hover */
.footer-qr-link {
    position: relative;
}

.footer-qr-popup {
    display: none;
    position: absolute;
    bottom: 28px;
    left: 0;
    width: 120px;
    height: 120px;
    border-radius: 8px;
    border: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    background: white;
    z-index: 100;
}

.footer-qr-link:hover .footer-qr-popup { display: block; }

/* === Responsive additions === */
@media (max-width: 1024px) {
    .ai-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 16px; }
    .articles-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 48px; }
}

@media (max-width: 768px) {
    .ai-grid { grid-template-columns: 1fr; }
    .social-follow { flex-direction: column; align-items: center; gap: 16px; }
}

/* === Print === */
@media print {
    .navbar, .scroll-top, .cta-card { display: none; }
    body { font-size: 12pt; }
    .hero { background: none; color: black; }
    .hero-title, .hero-subtitle { color: black; }
}