/* ============================================
   慧加油 - 智慧加油站系统 官网样式
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    /* Brand Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --accent: #f59e0b;
    --accent-light: #fbbf24;

    /* Secondary Colors */
    --pink: #ec4899;
    --green: #10b981;
    --orange: #f97316;
    --purple: #8b5cf6;
    --red: #ef4444;

    /* Neutrals */
    --text-dark: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --bg-light: #ffffff;
    --bg-section: #f8fafc;
    --bg-dark: #0f172a;

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.03);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);
    --shadow-primary: 0 8px 25px -5px rgba(37,99,235,0.3);
    --shadow-primary-lg: 0 16px 50px -10px rgba(37,99,235,0.35);

    /* Radius */
    --radius-sm: 6px;
    --radius: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-body);
    background: var(--bg-light);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

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

.section { padding: 100px 0; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary-lg {
    background: var(--primary);
    color: #fff;
    padding: 16px 36px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-primary);
}
.btn-primary-lg:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary-lg);
}

.btn-ghost-lg {
    background: rgba(255,255,255,0.6);
    color: var(--text-dark);
    padding: 16px 36px;
    font-size: 1.05rem;
    border: 2px solid var(--border);
    backdrop-filter: blur(8px);
}
.btn-ghost-lg:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--bg-light);
}

.btn-outline-sm {
    background: transparent;
    color: var(--primary);
    padding: 9px 22px;
    font-size: 0.9rem;
    border: 1.5px solid var(--primary);
    border-radius: var(--radius);
}
.btn-outline-sm:hover {
    background: var(--primary);
    color: #fff;
}

.btn-block { width: 100%; }

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, #818cf8 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 18px 0;
}
.navbar.scrolled {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
    padding: 12px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-dark);
    font-weight: 800;
    font-size: 1.35rem;
}
.navbar:not(.scrolled) .nav-logo { color: var(--text-dark); }

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 36px;
}
.nav-link {
    color: var(--text-body);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-link:hover {
    color: var(--primary);
}
.nav-link:hover::after { width: 100%; }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

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

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: floatOrb 12s ease-in-out infinite;
}
.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37,99,235,0.35) 0%, transparent 70%);
    top: -100px;
    right: -50px;
}
.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245,158,11,0.25) 0%, transparent 70%);
    bottom: -50px;
    left: -50px;
    animation-delay: -6s;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37,99,235,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero-content { max-width: 560px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37,99,235,0.08);
    color: var(--primary);
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 28px;
    border: 1px solid rgba(37,99,235,0.12);
}
.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(16,185,129,0.2);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(16,185,129,0.2); }
    50% { box-shadow: 0 0 0 6px rgba(16,185,129,0.1); }
}

.hero-title {
    font-size: 3.6rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-dark);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
}
.hero-stat {
    text-align: left;
}
.stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1;
}
.stat-suffix {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    margin-left: 2px;
}
.hero-stat p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Hero Visual - Dashboard Card */
.hero-visual {
    position: relative;
    perspective: 1000px;
}

.dashboard-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(3deg);
    transition: var(--transition-slow);
}
.dashboard-card:hover {
    transform: rotateY(0) rotateX(0);
}

.dash-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-section);
    border-bottom: 1px solid var(--border-light);
}
.dash-dots {
    display: flex;
    gap: 6px;
}
.dash-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dash-dots span:nth-child(1) { background: #ff5f57; }
.dash-dots span:nth-child(2) { background: #ffbd2e; }
.dash-dots span:nth-child(3) { background: #28ca42; }
.dash-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.dash-body { padding: 24px; }

.dash-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}
.dash-metric {
    background: var(--bg-section);
    border-radius: var(--radius);
    padding: 16px;
}
.metric-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 4px;
}
.metric-trend {
    font-size: 0.8rem;
    font-weight: 600;
}
.metric-trend.up { color: var(--green); }

.dash-chart {
    background: var(--bg-section);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
    height: 120px;
}
.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 88px;
}
.bar {
    flex: 1;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 4px 4px 2px 2px;
    animation: barGrow 1s ease-out;
    transform-origin: bottom;
}
@keyframes barGrow {
    from { transform: scaleY(0); }
    to { transform: scaleY(1); }
}

.dash-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.dash-tag {
    font-size: 0.8rem;
    color: var(--green);
    background: rgba(16,185,129,0.08);
    padding: 6px 12px;
    border-radius: 100px;
    font-weight: 500;
}

.float-card {
    position: absolute;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border-light);
    animation: floatCard 4s ease-in-out infinite;
}
.float-card-1 {
    top: -20px;
    left: -30px;
    animation-delay: 0s;
}
.float-card-2 {
    bottom: -20px;
    right: -20px;
    animation-delay: -2s;
}
.float-icon {
    font-size: 1.6rem;
}
.float-card strong {
    display: block;
    font-size: 0.88rem;
    color: var(--text-dark);
}
.float-card small {
    font-size: 0.76rem;
    color: var(--text-muted);
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ===== Trust Bar ===== */
.trust-bar {
    background: var(--bg-section);
    padding: 40px 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}
.trust-title {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.trust-tags {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.trust-tags span {
    font-size: 0.88rem;
    color: var(--text-body);
    background: var(--bg-light);
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border);
    font-weight: 500;
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}
.section-tag {
    display: inline-block;
    background: var(--primary-50);
    color: var(--primary);
    padding: 6px 18px;
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 18px;
}
.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.section-desc {
    font-size: 1.08rem;
    color: var(--text-muted);
}

/* ===== Features ===== */
.features-section { background: var(--bg-light); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}
.feature-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}
.feature-icon svg {
    width: 36px;
    height: 36px;
}
.icon-blue {
    background: var(--primary-50);
    color: var(--primary);
}
.icon-pink {
    background: #fdf2f8;
    color: var(--pink);
}
.icon-green {
    background: #ecfdf5;
    color: var(--green);
}
.icon-orange {
    background: #fff7ed;
    color: var(--orange);
}
.icon-red {
    background: #fef2f2;
    color: var(--red);
}
.icon-purple {
    background: #f5f3ff;
    color: var(--purple);
}

.feature-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.feature-card > p {
    font-size: 0.98rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}
.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.feature-list li {
    font-size: 0.9rem;
    color: var(--text-body);
    padding-left: 20px;
    position: relative;
}
.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

/* ===== Solution / Steps ===== */
.solution-section {
    background: var(--bg-section);
}

.steps {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    padding: 40px 28px;
    position: relative;
}
.step-number {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--bg-light);
    border: 2px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    transition: var(--transition);
    position: relative;
    z-index: 2;
}
.step:hover .step-number {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-primary);
    transform: scale(1.08);
}
.step-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.step-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.step-connector {
    flex: 0 0 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 40px;
}
.step-connector::before {
    content: '';
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
    position: relative;
}

/* ===== Advantages ===== */
.advantage-section { background: var(--bg-light); }

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.adv-card {
    text-align: center;
    padding: 40px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.adv-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.adv-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}
.adv-icon svg { width: 28px; height: 28px; }
.adv-card:hover .adv-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.1);
}

.adv-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}
.adv-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Data Banner ===== */
.data-section {
    padding: 60px 0;
    background: var(--bg-dark);
}

.data-banner {
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 20px;
}

.data-item {
    text-align: center;
}
.data-num {
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}
.data-suffix {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent);
}
.data-item p {
    font-size: 0.92rem;
    color: rgba(255,255,255,0.6);
    margin-top: 8px;
}

.data-divider {
    width: 1px;
    height: 60px;
    background: rgba(255,255,255,0.1);
}

/* ===== Cases ===== */
.cases-section { background: var(--bg-section); }

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.case-quote {
    font-size: 4rem;
    line-height: 0.5;
    color: var(--primary-100);
    font-family: Georgia, serif;
    margin-bottom: 16px;
    height: 24px;
}

.case-text {
    font-size: 0.98rem;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 24px;
}

.case-author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
}
.case-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}
.case-author strong {
    display: block;
    font-size: 0.95rem;
    color: var(--text-dark);
}
.case-author small {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.case-result {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.case-result span {
    font-size: 0.88rem;
    color: var(--text-muted);
}
.case-result strong {
    color: var(--primary);
    font-size: 1rem;
}

/* ===== Contact ===== */
.contact-section { background: var(--bg-light); }

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-50) 0%, #f0f7ff 100%);
    border-radius: var(--radius-xl);
    padding: 64px;
    border: 1px solid var(--border-light);
}

.contact-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 16px;
}
.contact-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 36px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
}
.method-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.method-icon svg { width: 22px; height: 22px; }
.contact-method small {
    display: block;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.contact-method strong {
    font-size: 1.1rem;
    color: var(--text-dark);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}
.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 12px;
    padding-right: 40px;
}
.form-group textarea {
    resize: none;
    font-family: inherit;
}

.form-note {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
}

/* Form Success Message */
.form-success {
    display: none;
    text-align: center;
    padding: 40px 20px;
}
.form-success.show {
    display: block;
    animation: fadeIn 0.5s ease;
}
.form-success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: rgba(16,185,129,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.form-success-icon svg { width: 32px; height: 32px; color: var(--green); }
.form-success h3 { margin-bottom: 8px; }
.form-success p { color: var(--text-muted); font-size: 0.95rem; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    padding: 64px 0 32px;
    color: rgba(255,255,255,0.7);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .nav-logo {
    color: #fff;
    margin-bottom: 16px;
}
.footer-brand .logo-icon { color: var(--primary-light); }
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.5);
}
.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 18px;
}
.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 10px;
    transition: var(--transition);
}
.footer-col a:hover {
    color: #fff;
}
.footer-time {
    color: rgba(255,255,255,0.4) !important;
    font-size: 0.85rem !important;
    margin-top: 8px;
}
.footer-addr {
    color: rgba(255,255,255,0.4) !important;
    font-size: 0.85rem !important;
    margin-top: 4px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    text-align: center;
}
.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* ===== Pain Points ===== */
.pain-section { background: var(--bg-section); }

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

.pain-card {
    display: flex;
    align-items: stretch;
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.pain-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.pain-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    font-size: 1.6rem;
    font-weight: 800;
    flex-shrink: 0;
}

.pain-arrow {
    display: flex;
    align-items: center;
    padding: 0 16px;
    color: var(--primary);
}
.pain-arrow svg { width: 24px; height: 24px; }

.pain-solution {
    padding: 24px 20px 24px 0;
    flex: 1;
}
.pain-solution h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}
.pain-solution p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 10px;
}
.pain-tag {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-50);
    padding: 4px 12px;
    border-radius: 100px;
    display: inline-block;
}

/* ===== Payment Scenarios ===== */
.scenario-section { background: var(--bg-light); }

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.scenario-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
}
.scenario-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.scenario-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--primary-50);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition);
}
.scenario-icon svg { width: 36px; height: 36px; }
.scenario-card:hover .scenario-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.05);
}

.scenario-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.scenario-card > p {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}
.scenario-card ul {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.scenario-card ul li {
    font-size: 0.85rem;
    color: var(--text-body);
    padding-left: 18px;
    position: relative;
}
.scenario-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

/* ===== AI Operation ===== */
.ai-section { background: var(--bg-section); }

.ai-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.ai-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}
.ai-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.ai-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 14px;
    background: var(--primary-50);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}
.ai-icon svg { width: 24px; height: 24px; }
.ai-card:hover .ai-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.1);
}

.ai-card span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* ===== Member Lifecycle ===== */
.lifecycle-section { background: var(--bg-light); }

.lifecycle-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.lifecycle-stage {
    text-align: center;
    flex: 1;
    min-width: 140px;
}

.lifecycle-dot {
    width: 72px;
    height: 72px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: var(--shadow-primary);
    transition: var(--transition);
}
.lifecycle-stage:hover .lifecycle-dot {
    transform: scale(1.08) translateY(-4px);
}

.lifecycle-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}
.lifecycle-stage p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.lifecycle-arrow {
    font-size: 1.5rem;
    color: var(--primary-light);
    font-weight: 300;
    padding-bottom: 40px;
}

.lifecycle-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.lc-feature {
    background: var(--bg-section);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.lc-feature:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-md);
    background: var(--bg-light);
}
.lc-feature h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}
.lc-feature p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== TikTok Marketing ===== */
.tiktok-section { background: var(--bg-section); }

.tiktok-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.tiktok-left {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tiktok-card {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    gap: 20px;
    transition: var(--transition);
}
.tiktok-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.tiktok-card-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-50);
    border-radius: var(--radius-md);
}
.tiktok-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}
.tiktok-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.tiktok-right {
    position: sticky;
    top: 100px;
}

.tiktok-data-card {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    color: #fff;
}

.tiktok-data-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.tiktok-data-period {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 28px;
}

.tiktok-data-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.tk-data-item {
    text-align: center;
    padding: 16px 8px;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.08);
}
.tk-num {
    font-size: 1.8rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}
.tk-unit {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    margin-left: 2px;
}
.tk-data-item p {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.5);
    margin-top: 6px;
}

/* ===== Fund Solution ===== */
.fund-section { background: var(--bg-light); }

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

.fund-card {
    text-align: center;
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    transition: var(--transition);
}
.fund-card:hover {
    border-color: var(--primary-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.fund-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}
.fund-icon svg { width: 28px; height: 28px; }
.fund-card:hover .fund-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.1);
}

.fund-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}
.fund-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Scroll Animations ===== */
[data-anim] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-anim].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-content { max-width: 100%; }
    .hero-cta, .hero-stats {
        justify-content: center;
    }
    .hero-badge { margin-left: auto; margin-right: auto; }
    .hero-visual { max-width: 500px; margin: 0 auto; }

    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cases-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
    .scenario-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
    .ai-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .fund-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tiktok-content {
        grid-template-columns: 1fr;
    }
    .tiktok-right {
        position: static;
    }
    .lifecycle-flow {
        flex-wrap: wrap;
        gap: 16px;
    }
    .lifecycle-stage {
        min-width: 120px;
    }
    .lifecycle-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    .section { padding: 64px 0; }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border-light);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-toggle { display: flex; }
    .nav-actions .btn-outline-sm { display: none; }

    .hero-title { font-size: 2.4rem; }
    .hero-subtitle { font-size: 1.05rem; }
    .hero-cta { flex-direction: column; align-items: center; }
    .btn-primary-lg, .btn-ghost-lg { width: 100%; max-width: 300px; }
    .hero-stats { gap: 24px; justify-content: space-around; width: 100%; }
    .stat-num { font-size: 1.6rem; }

    .section-title { font-size: 1.8rem; }
    .section-desc { font-size: 0.98rem; }

    .features-grid { grid-template-columns: 1fr; }
    .feature-list { grid-template-columns: 1fr; }

    .steps { flex-direction: column; gap: 0; }
    .step-connector {
        flex: 0;
        width: 2px;
        height: 40px;
        padding: 0;
    }
    .step-connector::before {
        width: 2px;
        height: 100%;
        background: linear-gradient(180deg, var(--primary), var(--primary-light));
    }

    .advantage-grid { grid-template-columns: 1fr; }
    .pain-grid { grid-template-columns: 1fr; }
    .scenario-card ul { grid-template-columns: 1fr; }
    .ai-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .fund-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .lifecycle-features { grid-template-columns: 1fr; }
    .tiktok-data-list { grid-template-columns: 1fr; }
    .lifecycle-flow { flex-direction: column; gap: 24px; }
    .lifecycle-stage { min-width: auto; }

    .data-banner { flex-direction: column; gap: 32px; }
    .data-divider { width: 60px; height: 1px; }
    .data-num { font-size: 2.2rem; }

    .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 32px;
    }
    .contact-title { font-size: 1.6rem; }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .footer-brand { grid-column: 1 / -1; }

    .float-card { display: none; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 0.95rem; }
    .hero-stats { flex-direction: column; gap: 20px; align-items: center; }
    .hero-stat { text-align: center; }

    .section-title { font-size: 1.5rem; }
    .section-header { margin-bottom: 40px; }

    .feature-card { padding: 28px 20px; }
    .adv-card { padding: 28px 20px; }
    .case-card { padding: 28px 24px; }
    .scenario-card { padding: 28px 20px; }
    .pain-card { flex-direction: column; }
    .pain-num { width: 100%; height: 48px; }
    .pain-arrow { display: none; }
    .pain-solution { padding: 20px; }
    .tiktok-card { flex-direction: column; }
    .tiktok-data-card { padding: 28px 20px; }

    .contact-form-wrapper { padding: 28px 20px; }
    .contact-wrapper { padding: 24px; }

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