/* ============================================================
   汇嘟嘟企业官网 - 共用样式
   ============================================================
   主色：橙色系（#FF6B35）— 体现「交易」「收款」氛围
   辅色：深空灰（#1A1F36）— 科技感
   强调：暖橙渐变（#FF6B35 → #FF9550）
   ============================================================ */

:root {
    --primary: #FF6B35;
    --primary-light: #FF9550;
    --primary-dark: #E5511D;
    --secondary: #1A1F36;
    --secondary-light: #2D3554;
    --accent: #FFD166;
    --success: #06D6A0;
    --danger: #EF476F;
    --info: #118AB2;
    --dark: #0D1117;
    --gray-900: #1A1F36;
    --gray-700: #4A5468;
    --gray-500: #8B95A5;
    --gray-300: #D5DBE5;
    --gray-100: #F4F6FA;
    --gray-50: #F9FBFD;
    --white: #FFFFFF;
    --shadow-sm: 0 2px 8px rgba(26, 31, 54, 0.06);
    --shadow-md: 0 8px 24px rgba(26, 31, 54, 0.08);
    --shadow-lg: 0 16px 48px rgba(26, 31, 54, 0.12);
    --shadow-orange: 0 8px 24px rgba(255, 107, 53, 0.25);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --gradient-primary: linear-gradient(135deg, #FF6B35 0%, #FF9550 100%);
    --gradient-dark: linear-gradient(135deg, #1A1F36 0%, #2D3554 100%);
    --gradient-hero: linear-gradient(135deg, #FFF8F4 0%, #FFEDD9 100%);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    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", Roboto, Helvetica, Arial, sans-serif;
    color: var(--gray-900);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

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

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

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

/* ============================================================
   导航栏
   ============================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--gray-100);
    transition: all var(--transition);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 800;
    color: var(--secondary);
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--gradient-primary);
    display: grid;
    place-items: center;
    color: var(--white);
    font-weight: 900;
    box-shadow: var(--shadow-orange);
    font-size: 18px;
}

.brand-name {
    letter-spacing: -0.5px;
}

.brand-name b {
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--gray-700);
    font-weight: 500;
    font-size: 15px;
    padding: 8px 0;
    position: relative;
}

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

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

.nav-links a.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    border-radius: 2px;
    background: var(--gradient-primary);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 100px;
    background: var(--gradient-primary);
    color: var(--white) !important;
    font-weight: 600;
    box-shadow: var(--shadow-orange);
    transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.35);
    color: var(--white) !important;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--gray-100);
    border: none;
    color: var(--secondary);
    cursor: pointer;
    font-size: 18px;
}

/* ============================================================
   Hero 首屏
   ============================================================ */
.hero {
    position: relative;
    padding: 100px 0 120px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -300px;
    left: -200px;
    width: 700px;
    height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 209, 102, 0.18) 0%, transparent 70%);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 100px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    color: var(--secondary);
    margin-bottom: 20px;
}

.hero h1 .hl {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p.lead {
    font-size: 18px;
    color: var(--gray-700);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-orange);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.4);
    color: var(--white);
}

.btn-outline {
    background: var(--white);
    color: var(--secondary);
    border: 2px solid var(--gray-300);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.hero-stat .num {
    font-size: 30px;
    font-weight: 800;
    color: var(--secondary);
    letter-spacing: -1px;
}

.hero-stat .num b {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-stat .lbl {
    font-size: 13px;
    color: var(--gray-500);
}

.hero-visual {
    position: relative;
    height: 480px;
}

.hero-visual .phone {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 560px;
    border-radius: 36px;
    background: var(--secondary);
    padding: 12px;
    box-shadow: var(--shadow-lg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 26px;
    background: linear-gradient(180deg, #FFF8F4 0%, #FFE9D3 100%);
    overflow: hidden;
    position: relative;
    padding: 24px 16px;
}

.phone-status {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 20px;
}

.phone-shop {
    background: var(--white);
    border-radius: 14px;
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.phone-shop .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: grid;
    place-items: center;
    color: var(--white);
    font-weight: 700;
}

.phone-shop .info {
    flex: 1;
}

.phone-shop .info .name {
    font-size: 13px;
    font-weight: 700;
    color: var(--secondary);
}

.phone-shop .info .desc {
    font-size: 11px;
    color: var(--gray-500);
}

.phone-amount {
    background: var(--white);
    border-radius: 14px;
    padding: 18px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 18px;
    text-align: center;
}

.phone-amount .lbl {
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.phone-amount .val {
    font-size: 32px;
    font-weight: 800;
    color: var(--secondary);
    letter-spacing: -1px;
}

.phone-amount .val .cur {
    font-size: 18px;
    color: var(--primary);
    margin-right: 4px;
}

.phone-btn {
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 12px;
    padding: 14px;
    text-align: center;
    font-weight: 700;
    font-size: 14px;
    box-shadow: var(--shadow-orange);
}

.hero-bubble {
    position: absolute;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    animation: floaty 4s ease-in-out infinite;
}

.hero-bubble.b1 {
    top: 30px;
    left: 0;
    animation-delay: 0s;
}

.hero-bubble.b2 {
    bottom: 80px;
    right: 20px;
    animation-delay: 1.5s;
}

.hero-bubble.b3 {
    bottom: 200px;
    left: 30px;
    animation-delay: 3s;
}

.hero-bubble .title {
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.hero-bubble .value {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
}

.hero-bubble .value.up::after {
    content: " ↑";
    color: var(--success);
}

@keyframes floaty {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ============================================================
   Section 通用
   ============================================================ */
section {
    padding: 96px 0;
}

.section-head {
    text-align: center;
    margin-bottom: 64px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1.2px;
    color: var(--secondary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--gray-700);
    max-width: 640px;
    margin: 0 auto;
}

/* ============================================================
   Features 卡片网格
   ============================================================ */
.features {
    background: var(--gray-50);
}

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

.feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid transparent;
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--gradient-primary);
    display: grid;
    place-items: center;
    color: var(--white);
    margin-bottom: 20px;
    box-shadow: var(--shadow-orange);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
}

.feature-desc {
    color: var(--gray-700);
    font-size: 14.5px;
    line-height: 1.7;
}

/* ============================================================
   Stats 数据
   ============================================================ */
.stats {
    background: var(--gradient-dark);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 209, 102, 0.1) 0%, transparent 50%);
}

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

.stat-item {
    text-align: center;
    padding: 32px 16px;
}

.stat-value {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -1.5px;
}

.stat-value b {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 14.5px;
    color: var(--gray-300);
    letter-spacing: 0.5px;
}

/* ============================================================
   Product 模块
   ============================================================ */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--gray-100);
    transition: all var(--transition);
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.product-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.product-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(255, 149, 80, 0.18));
    color: var(--primary);
    display: grid;
    place-items: center;
}

.product-icon svg {
    width: 32px;
    height: 32px;
}

.product-body {
    flex: 1;
}

.product-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.product-card p {
    color: var(--gray-700);
    margin-bottom: 16px;
}

.product-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.product-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 100px;
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: 12px;
    font-weight: 600;
}

/* ============================================================
   Scenarios 场景
   ============================================================ */
.scenarios {
    background: var(--gray-50);
}

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

.scenario-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

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

.scenario-cover {
    height: 200px;
    position: relative;
    overflow: hidden;
    display: grid;
    place-items: center;
}

.scenario-cover.c1 { background: linear-gradient(135deg, #FF6B35, #FF9550); }
.scenario-cover.c2 { background: linear-gradient(135deg, #118AB2, #06D6A0); }
.scenario-cover.c3 { background: linear-gradient(135deg, #EF476F, #FFD166); }
.scenario-cover.c4 { background: linear-gradient(135deg, #1A1F36, #4A5468); }

.scenario-cover svg {
    width: 96px;
    height: 96px;
    color: var(--white);
    opacity: 0.92;
}

.scenario-body {
    padding: 28px;
}

.scenario-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    border-radius: 100px;
    margin-bottom: 12px;
}

.scenario-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
}

.scenario-card p {
    color: var(--gray-700);
    font-size: 14.5px;
}

/* ============================================================
   CTA Banner
   ============================================================ */
.cta-banner {
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
    border-radius: var(--radius-xl);
    padding: 64px 40px;
    margin: 96px 0;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: "";
    position: absolute;
    top: -80px;
    left: -80px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.cta-banner::after {
    content: "";
    position: absolute;
    bottom: -100px;
    right: -100px;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}

.cta-banner > * {
    position: relative;
    z-index: 1;
}

.cta-banner h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.cta-banner p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.95;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.cta-banner .btn {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.cta-banner .btn:hover {
    color: var(--primary-dark);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: var(--dark);
    color: var(--gray-300);
    padding: 72px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.footer-brand p {
    font-size: 14px;
    color: var(--gray-500);
    max-width: 320px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
}

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

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--gray-500);
    font-size: 14px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    color: var(--gray-500);
}

.footer-bottom a {
    color: var(--gray-300);
}

/* ============================================================
   表单 (Contact)
   ============================================================ */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 56px;
}

.contact-info {
    background: var(--gradient-dark);
    color: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px;
    position: relative;
    overflow: hidden;
}

.contact-info::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.3) 0%, transparent 70%);
}

.contact-info h3 {
    color: var(--white);
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.contact-info > p {
    color: var(--gray-300);
    margin-bottom: 36px;
    position: relative;
}

.contact-list {
    list-style: none;
    position: relative;
}

.contact-list li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 22px;
}

.contact-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 107, 53, 0.15);
    color: var(--primary);
    display: grid;
    place-items: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-list .label {
    font-size: 12.5px;
    color: var(--gray-500);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.contact-list .value {
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
}

.contact-form {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 8px;
}

.contact-form .lead {
    color: var(--gray-700);
    margin-bottom: 28px;
    font-size: 14.5px;
}

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

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-100);
    border-radius: var(--radius-sm);
    font-size: 14.5px;
    color: var(--secondary);
    background: var(--gray-50);
    transition: all var(--transition);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

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

.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 8px;
    box-shadow: var(--shadow-orange);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.4);
}

.form-tip {
    margin-top: 14px;
    font-size: 12.5px;
    color: var(--gray-500);
    text-align: center;
}

/* ============================================================
   About / Brand
   ============================================================ */
.about-hero {
    padding: 80px 0;
    background: var(--gradient-hero);
    text-align: center;
}

.about-hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--secondary);
    letter-spacing: -1.5px;
    margin-bottom: 16px;
}

.about-hero h1 .hl {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-hero p {
    font-size: 18px;
    color: var(--gray-700);
    max-width: 640px;
    margin: 0 auto;
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.story-img {
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    height: 420px;
    display: grid;
    place-items: center;
    position: relative;
    overflow: hidden;
}

.story-img::before {
    content: "";
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    top: -80px;
    right: -80px;
}

.story-img::after {
    content: "";
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    bottom: -60px;
    left: -60px;
}

.story-img .icon-big {
    width: 140px;
    height: 140px;
    border-radius: 36px;
    background: var(--white);
    display: grid;
    place-items: center;
    color: var(--primary);
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.story-img .icon-big svg {
    width: 70px;
    height: 70px;
}

.story-content h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.story-content p {
    color: var(--gray-700);
    margin-bottom: 16px;
    font-size: 15.5px;
}

.story-points {
    list-style: none;
    margin-top: 24px;
}

.story-points li {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
    color: var(--secondary);
    font-weight: 500;
}

.story-points li::before {
    content: "✓";
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.15);
    color: var(--primary);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

/* ============================================================
   Timeline
   ============================================================ */
.timeline {
    background: var(--gray-50);
}

.timeline-list {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline-list::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--gray-300);
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: center;
    margin-bottom: 32px;
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-card { grid-column: 1; text-align: right; }
.timeline-item:nth-child(even) .timeline-card { grid-column: 2; }

.timeline-item::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: 0 0 0 4px var(--white), 0 0 0 6px rgba(255, 107, 53, 0.2);
    z-index: 1;
}

.timeline-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.timeline-card:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

.timeline-year {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 100px;
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 8px;
}

.timeline-card h4 {
    color: var(--secondary);
    font-size: 17px;
    margin-bottom: 8px;
}

.timeline-card p {
    color: var(--gray-700);
    font-size: 14px;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list {
    max-width: 760px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: all var(--transition);
}

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

.faq-q {
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--secondary);
    font-size: 15.5px;
}

.faq-q::after {
    content: "+";
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--secondary);
    display: grid;
    place-items: center;
    font-size: 18px;
    font-weight: 400;
    transition: all var(--transition);
    flex-shrink: 0;
}

.faq-item.open .faq-q::after {
    content: "−";
    background: var(--gradient-primary);
    color: var(--white);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
    padding: 0 24px;
    color: var(--gray-700);
    font-size: 14.5px;
}

.faq-item.open .faq-a {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ============================================================
   Page banner (sub pages)
   ============================================================ */
.page-banner {
    padding: 80px 0 60px;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: "";
    position: absolute;
    top: -150px;
    right: -150px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
}

.page-banner h1 {
    font-size: 44px;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 12px;
    letter-spacing: -1.2px;
    position: relative;
}

.page-banner p {
    font-size: 17px;
    color: var(--gray-700);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.breadcrumb {
    margin-bottom: 16px;
    font-size: 13.5px;
    color: var(--gray-500);
    position: relative;
}

.breadcrumb a {
    color: var(--gray-700);
}

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

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 992px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero p.lead { margin-left: auto; margin-right: auto; }

    .hero-actions { justify-content: center; }

    .hero-stats { justify-content: center; }

    .hero-visual { height: 400px; max-width: 360px; margin: 0 auto; }

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

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

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

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

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

    .contact-wrap { grid-template-columns: 1fr; }

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

    .timeline-list::before { left: 20px; }

    .timeline-item { grid-template-columns: 60px 1fr; gap: 16px; }

    .timeline-item:nth-child(odd) .timeline-card,
    .timeline-item:nth-child(even) .timeline-card {
        grid-column: 2;
        text-align: left;
    }

    .timeline-item::before { left: 20px; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-toggle { display: grid; place-items: center; }
    .nav-links.mobile-open {
        display: flex;
        position: absolute;
        top: 72px;
        right: 0;
        left: 0;
        flex-direction: column;
        background: var(--white);
        padding: 16px 24px;
        box-shadow: var(--shadow-md);
        gap: 0;
        align-items: stretch;
    }
    .nav-links.mobile-open li { padding: 10px 0; border-bottom: 1px solid var(--gray-100); }

    .hero { padding: 60px 0 80px; }
    .hero h1 { font-size: 38px; }
    .hero p.lead { font-size: 16px; }

    .section-title { font-size: 30px; }
    .page-banner h1, .about-hero h1 { font-size: 32px; }

    section { padding: 64px 0; }

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

    .stat-value { font-size: 36px; }

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

    .cta-banner { padding: 48px 24px; margin: 64px 0; }
    .cta-banner h2 { font-size: 26px; }

    .form-row { grid-template-columns: 1fr; }

    .contact-info, .contact-form { padding: 32px 24px; }
}