/* ===== 易歪歪 - 全局样式 ===== */

/* 绚丽配色方案 */
:root {
    --primary-purple: #667eea;
    --primary-pink: #f093fb;
    --primary-blue: #4facfe;
    --secondary-coral: #ff6b9d;
    --secondary-mint: #43e97b;
    --accent-gold: #ffd93d;
    --accent-orange: #ff8a5c;
    --accent-cyan: #00d4ff;

    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

    --white: #ffffff;
    --dark: #1a1a2e;
    --dark-light: #16213e;
    --gray: #6c757d;
    --light-gray: #f8f9fa;

    --shadow-color: rgba(102, 126, 234, 0.3);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.7;
    color: var(--dark);
    background: var(--white);
    overflow-x: hidden;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--light-gray);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--primary-purple), var(--primary-pink));
    border-radius: 5px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 20px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 8px 40px rgba(102, 126, 234, 0.15);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.nav-logo-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--white);
    font-weight: bold;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    transition: var(--transition);
}

.nav-logo:hover .nav-logo-icon {
    transform: rotate(10deg) scale(1.05);
}

.nav-logo-text {
    font-size: 26px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 15px;
    position: relative;
    padding: 8px 0;
    transition: var(--transition);
}

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

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

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

.nav-btn {
    background: var(--gradient-1) !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: unset !important;
    background-clip: unset !important;
    color: var(--white) !important;
    padding: 12px 28px !important;
    border-radius: 30px !important;
    font-weight: 700 !important;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    transition: var(--transition);
}

.nav-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5);
}

.nav-btn::after {
    display: none !important;
}

/* 汉堡菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

/* 动态背景 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(240, 147, 251, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(79, 172, 254, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 107, 157, 0.2) 0%, transparent 40%);
    animation: bgMove 15s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

@keyframes bgMove {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.hero-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 20px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 30px;
    color: var(--white);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 25px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-badge span {
    font-size: 18px;
}

.hero-text h1 {
    font-size: 64px;
    font-weight: 900;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 25px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.hero-text h1 span {
    display: block;
    background: linear-gradient(90deg, #ffd93d, #ff6b9d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 44px;
}

.hero-text p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 40px;
    line-height: 1.9;
    max-width: 560px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 17px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-purple);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: var(--white);
    transform: translateY(-5px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 42px;
    font-weight: 900;
    color: var(--white);
    line-height: 1;
}

.stat-number span {
    background: linear-gradient(90deg, #ffd93d, #ff6b9d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 8px;
}

/* Hero 视觉区域 */
.hero-visual {
    position: relative;
}

.hero-phone {
    position: relative;
    background: linear-gradient(145deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 40px;
    padding: 20px;
    box-shadow:
        0 50px 100px rgba(0, 0, 0, 0.4),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(1deg); }
    50% { transform: translateY(-25px) rotate(-1deg); }
}

.phone-screen {
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 28px;
    min-height: 450px;
    padding: 30px;
    position: relative;
    overflow: hidden;
}

.phone-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: white;
    margin-bottom: 30px;
}

.phone-header h4 {
    font-size: 18px;
    font-weight: 700;
}

.phone-messages {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 85%;
    padding: 15px 20px;
    border-radius: 20px;
    font-size: 14px;
    line-height: 1.6;
    animation: messageIn 0.5s ease forwards;
    opacity: 0;
}

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

.message-1 {
    background: rgba(255, 255, 255, 0.95);
    color: var(--dark);
    border-bottom-left-radius: 5px;
    animation-delay: 0.3s;
}

.message-2 {
    background: rgba(255, 107, 157, 0.9);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 5px;
    animation-delay: 0.6s;
}

.message-3 {
    background: rgba(255, 255, 255, 0.95);
    color: var(--dark);
    border-bottom-left-radius: 5px;
    animation-delay: 0.9s;
}

.message-4 {
    background: rgba(67, 233, 123, 0.9);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 5px;
    animation-delay: 1.2s;
}

.quick-reply {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.quick-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 10px 18px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    animation: messageIn 0.5s ease forwards;
    animation-delay: 1.5s;
    opacity: 0;
}

.quick-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* 漂浮图标 */
.floating-icon {
    position: absolute;
    font-size: 40px;
    animation: bounce 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

.floating-icon.icon-1 { top: -20px; right: -30px; animation-delay: 0s; }
.floating-icon.icon-2 { bottom: 50px; left: -40px; animation-delay: 0.5s; }
.floating-icon.icon-3 { top: 50%; right: -50px; animation-delay: 1s; }

@keyframes bounce {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* ===== CTA 横幅 ===== */
.cta-banner {
    background: linear-gradient(135deg, #ff6b9d 0%, #ffa726 50%, #ffd93d 100%);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.cta-banner h2 {
    font-size: 48px;
    font-weight: 900;
    color: white;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cta-banner p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 35px;
}

.btn-cta {
    background: white;
    color: var(--secondary-coral);
    padding: 20px 50px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 800;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.btn-cta:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

/* ===== 功能特点 ===== */
.features {
    padding: 120px 20px;
    background: linear-gradient(180deg, #ffffff 0%, #f0f4ff 100%);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(240, 147, 251, 0.1));
    color: var(--primary-purple);
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.section-title {
    font-size: 52px;
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 18px;
}

.section-title span {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 20px;
    color: var(--gray);
    max-width: 650px;
    margin: 0 auto;
}

.features-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 45px 35px;
    border-radius: 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(102, 126, 234, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(102, 126, 234, 0.2);
    border-color: transparent;
}

.feature-icon {
    width: 90px;
    height: 90px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 42px;
    margin: 0 auto 28px;
    position: relative;
}

.feature-icon.purple { background: linear-gradient(135deg, #667eea, #764ba2); }
.feature-icon.pink { background: linear-gradient(135deg, #f093fb, #f5576c); }
.feature-icon.blue { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.feature-icon.green { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.feature-icon.orange { background: linear-gradient(135deg, #ffa726, #ff6b9d); }
.feature-icon.cyan { background: linear-gradient(135deg, #00d4ff, #667eea); }
.feature-icon.gold { background: linear-gradient(135deg, #ffd93d, #ffa726); }
.feature-icon.red { background: linear-gradient(135deg, #f5576c, #ff6b9d); }

.feature-card:hover .feature-icon {
    transform: rotate(10deg) scale(1.1);
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.8;
}

/* ===== 使用流程 ===== */
.how-it-works {
    padding: 120px 20px;
    background: linear-gradient(180deg, #f0f4ff 0%, #fff5f5 50%, #f0fff4 100%);
}

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

.steps-container::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 12.5%;
    right: 12.5%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #f093fb, #ffd93d, #43e97b);
    border-radius: 2px;
    z-index: 0;
}

.step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: white;
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 900;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
}

.step:nth-child(1) .step-number { background: linear-gradient(135deg, #667eea, #764ba2); color: white; }
.step:nth-child(2) .step-number { background: linear-gradient(135deg, #f093fb, #f5576c); color: white; }
.step:nth-child(3) .step-number { background: linear-gradient(135deg, #ffd93d, #ffa726); color: white; }
.step:nth-child(4) .step-number { background: linear-gradient(135deg, #43e97b, #38f9d7); color: white; }

.step:hover .step-number {
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

.step h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.step p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
}

/* ===== 数据展示 ===== */
.stats-section {
    padding: 100px 20px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(240, 147, 251, 0.3) 0%, transparent 50%);
}

.stats-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.stat-value {
    font-size: 56px;
    font-weight: 900;
    color: white;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-value .accent {
    background: linear-gradient(90deg, #667eea, #f093fb, #ffd93d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
}

/* ===== 用户评价 ===== */
.testimonials {
    padding: 120px 20px;
    background: white;
}

.testimonials-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.testimonial-card {
    background: linear-gradient(145deg, #f8f9fa, #ffffff);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: var(--transition);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 120px;
    font-family: Georgia, serif;
    color: rgba(102, 126, 234, 0.08);
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(102, 126, 234, 0.15);
    border-color: transparent;
}

.testimonial-text {
    font-size: 17px;
    color: var(--dark);
    line-height: 1.9;
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    color: white;
}

.author-avatar:nth-child(1) { background: linear-gradient(135deg, #667eea, #764ba2); }
.author-avatar:nth-child(2) { background: linear-gradient(135deg, #f093fb, #f5576c); }
.author-avatar:nth-child(3) { background: linear-gradient(135deg, #43e97b, #38f9d7); }

.author-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
}

.author-info p {
    font-size: 14px;
    color: var(--gray);
}

.testimonial-stars {
    margin-top: 20px;
    font-size: 18px;
}

/* ===== FAQ ===== */
.faq {
    padding: 120px 20px;
    background: linear-gradient(180deg, #f0f4ff 0%, #fff 100%);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 20px;
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.1);
}

.faq-question {
    padding: 25px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    flex: 1;
    padding-right: 20px;
}

.faq-question .icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

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

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 30px 25px;
}

.faq-answer p {
    font-size: 16px;
    color: var(--gray);
    line-height: 1.9;
}

/* ===== 产品展示 ===== */
.showcase {
    padding: 120px 20px;
    background: linear-gradient(180deg, #fff 0%, #f0f4ff 100%);
}

.showcase-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.showcase-image {
    position: relative;
}

.showcase-mockup {
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 30px;
    padding: 40px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.25);
}

.mockup-header {
    display: flex;
    gap: 8px;
    margin-bottom: 30px;
}

.mockup-header span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.mockup-header span:nth-child(1) { background: #ff5f56; }
.mockup-header span:nth-child(2) { background: #ffbd2e; }
.mockup-header span:nth-child(3) { background: #27c93f; }

.mockup-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 30px;
    min-height: 300px;
}

.mockup-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.mockup-tab {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    color: white;
    font-size: 14px;
    font-weight: 600;
}

.mockup-tab:first-child {
    background: white;
    color: var(--primary-purple);
}

.mockup-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mockup-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 15px 20px;
    border-radius: 12px;
    color: white;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.showcase-badge {
    position: absolute;
    top: -20px;
    right: -20px;
    background: linear-gradient(135deg, #ffd93d, #ffa726);
    color: white;
    padding: 15px 25px;
    border-radius: 15px;
    font-weight: 800;
    font-size: 14px;
    box-shadow: 0 10px 30px rgba(255, 217, 61, 0.4);
    animation: pulse 2s ease-in-out infinite;
}

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

.showcase-info h2 {
    font-size: 48px;
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 25px;
    line-height: 1.2;
}

.showcase-info h2 span {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.showcase-info > p {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 35px;
    line-height: 1.9;
}

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

.showcase-list li {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 22px;
    font-size: 17px;
    color: var(--dark);
    font-weight: 600;
}

.showcase-list li span {
    width: 36px;
    height: 36px;
    background: var(--gradient-3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
}

/* ===== 文章中心 ===== */
.articles {
    padding: 120px 20px;
    background: white;
}

.articles-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.article-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border: 1px solid rgba(102, 126, 234, 0.08);
}

.article-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 30px 60px rgba(102, 126, 234, 0.18);
    border-color: transparent;
}

.article-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 70px;
    position: relative;
    overflow: hidden;
}

.article-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, rgba(0,0,0,0.1), transparent);
}

.article-card:nth-child(1) .article-image { background: linear-gradient(135deg, #667eea, #764ba2); }
.article-card:nth-child(2) .article-image { background: linear-gradient(135deg, #f093fb, #f5576c); }
.article-card:nth-child(3) .article-image { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.article-card:nth-child(4) .article-image { background: linear-gradient(135deg, #43e97b, #38f9d7); }
.article-card:nth-child(5) .article-image { background: linear-gradient(135deg, #ffd93d, #ffa726); }
.article-card:nth-child(6) .article-image { background: linear-gradient(135deg, #f5576c, #ff6b9d); }

.article-content {
    padding: 30px;
}

.article-category {
    display: inline-block;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(240, 147, 251, 0.1));
    color: var(--primary-purple);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 15px;
}

.article-title {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-title a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.article-title a:hover {
    color: var(--primary-purple);
}

.article-excerpt {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(102, 126, 234, 0.1);
    font-size: 13px;
    color: var(--gray);
}

.article-author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.load-more {
    text-align: center;
    margin-top: 60px;
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 45px;
    background: var(--gradient-1);
    color: white;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.load-more-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

/* ===== 底部 ===== */
.footer {
    background: linear-gradient(180deg, #1a1a2e 0%, #0f0f1a 100%);
    color: white;
    padding: 100px 20px 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
}

.footer-brand .nav-logo {
    margin-bottom: 25px;
}

.footer-brand .nav-logo-icon {
    background: var(--gradient-2);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.9;
    font-size: 15px;
    margin-top: 15px;
}

.footer-title {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 28px;
    position: relative;
    padding-bottom: 15px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 4px;
    background: var(--gradient-2);
    border-radius: 2px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition);
    display: inline-block;
}

.footer-links a:hover {
    color: white;
    transform: translateX(8px);
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--gradient-2);
    transform: translateY(-5px);
}

.footer-bottom {
    max-width: 1200px;
    margin: 70px auto 0;
    padding-top: 35px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 48px;
    }

    .hero-text h1 span {
        font-size: 32px;
    }

    .hero-text p {
        margin: 0 auto 40px;
    }

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

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

    .hero-visual {
        display: none;
    }

    .showcase-content {
        grid-template-columns: 1fr;
    }

    .showcase-image {
        order: -1;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .hero-text h1 span {
        font-size: 26px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 25px;
    }

    .stat-item {
        text-align: center;
    }

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

    .section-title {
        font-size: 36px;
    }

    .features-grid,
    .steps-container,
    .stats-grid,
    .testimonials-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .steps-container::before {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-social {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .showcase-info h2 {
        font-size: 36px;
    }

    .cta-banner h2 {
        font-size: 36px;
    }

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

    .login-container {
        padding: 40px 25px;
    }
}