/*
 * Order Supplement Platform Official Website Stylesheet
 * Copyright © 2024 Order Supplement Platform
 * Official Website: http://ahcj.com.cn/
 * Unauthorized copying, modification or distribution is prohibited
 * Website Fingerprint: BUDAN-CSS-2024-ORIGINAL
 */

/* Global Style Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

:root {
    /* Blue Theme Colors */
    --primary-blue: #1e3a8a;
    --secondary-blue: #3b82f6;
    --light-blue: #60a5fa;
    --lighter-blue: #93c5fd;
    --lightest-blue: #dbeafe;
    --dark-blue: #1e40af;
    --gradient-blue: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-light: linear-gradient(135deg, #60a5fa 0%, #93c5fd 100%);
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f3f4f6;
    --gray: #6b7280;
    --dark-gray: #374151;
    --black: #111827;
    
    /* Fonts */
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation Bar Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    text-decoration: none;
}

.logo span {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-blue);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active,
.nav-link.is-current {
    color: var(--secondary-blue);
}

.nav-link:hover::after,
.nav-link.active::after,
.nav-link.is-current::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: var(--transition);
}

/* Hero Banner Carousel */
.hero {
    position: relative;
    overflow: hidden;
    height: 680px;
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-photo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.72) 0%, rgba(59, 130, 246, 0.58) 100%);
    z-index: 1;
}

.hero-slide:nth-child(1) .hero-background {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.78) 0%, rgba(59, 130, 246, 0.55) 100%);
}

.hero-slide:nth-child(2) .hero-background {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.78) 0%, rgba(30, 64, 175, 0.58) 100%);
}

.hero-slide:nth-child(3) .hero-background {
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.76) 0%, rgba(99, 102, 241, 0.55) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s backwards;
}

/* Carousel Indicators */
.hero-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--white);
    width: 30px;
    border-radius: 6px;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

/* Carousel Arrows */
.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    backdrop-filter: blur(5px);
}

.hero-arrow:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.hero-arrow-left {
    left: 30px;
}

.hero-arrow-right {
    right: 30px;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-blue);
}

.btn-primary:hover {
    background: var(--lightest-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--secondary-blue);
    border-color: var(--secondary-blue);
}

.btn-outline:hover {
    background: var(--secondary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Common Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-blue);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 3rem;
}

/* Services Section */
.services {
    background: linear-gradient(180deg, var(--light-gray) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--lighter-blue);
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: inline-block;
    padding: 1rem;
    background: var(--lightest-blue);
    border-radius: 50%;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--lighter-blue);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* Platform Advantages */
.advantages {
    position: relative;
    background: var(--white);
}

.advantages::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(147, 197, 253, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-item {
    padding: 2rem;
    background: linear-gradient(135deg, var(--lightest-blue) 0%, rgba(219, 234, 254, 0.5) 100%);
    border-radius: 16px;
    transition: var(--transition);
    border-left: 4px solid var(--secondary-blue);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.5) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

.advantage-item:hover {
    background: linear-gradient(135deg, var(--lighter-blue) 0%, var(--lightest-blue) 100%);
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.advantage-item:hover::before {
    opacity: 1;
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-blue);
    margin-bottom: 1rem;
}

.advantage-item h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.advantage-item p {
    color: var(--dark-gray);
    line-height: 1.8;
}

/* Operation Process */
.process {
    background: var(--light-gray);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    position: relative;
}

.process-step {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.process-step:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.process-step h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--gray);
    line-height: 1.8;
}

/* Platform Statistics */
.statistics {
    background: var(--gradient-blue);
    color: var(--white);
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.stat-label {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.stat-desc {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Customer Cases */
.cases {
    background: var(--light-gray);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.case-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-left: 4px solid var(--secondary-blue);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.case-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.case-platform {
    background: var(--secondary-blue);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.case-category {
    background: var(--lightest-blue);
    color: var(--primary-blue);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.case-card h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.case-stats {
    background: var(--lightest-blue);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.case-stat {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
}

.case-stat:last-child {
    margin-bottom: 0;
}

.case-stat .label {
    color: var(--dark-gray);
    font-weight: 500;
}

.case-stat .value {
    color: var(--primary-blue);
    font-weight: 700;
}

.case-stat .highlight {
    color: #ef4444;
    font-size: 1.2rem;
}

.case-desc {
    color: var(--gray);
    line-height: 1.8;
}

/* Security Assurance */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.security-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.security-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.security-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.security-card h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

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

.security-list li {
    padding: 0.8rem 0;
    color: var(--dark-gray);
    border-bottom: 1px solid var(--lightest-blue);
}

.security-list li:last-child {
    border-bottom: none;
}

.security-promise {
    background: var(--gradient-blue);
    color: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
}

.security-promise h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.security-promise p {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.95;
}

/* FAQ Section */
.faq {
    background: var(--light-gray);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    background: var(--white);
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--lightest-blue);
}

.faq-question h3 {
    font-size: 1.1rem;
    color: var(--primary-blue);
    margin: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--secondary-blue);
    font-weight: 700;
    transition: var(--transition);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 2rem 1.5rem 2rem;
    color: var(--dark-gray);
    line-height: 1.8;
    margin: 0;
}

/* Footer */
.footer {
    background: var(--primary-blue);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.footer-section p {
    line-height: 1.8;
    opacity: 0.9;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 1.5rem;
    text-align: center;
    opacity: 0.8;
}

.footer-bottom a {
    color: var(--white);
    text-decoration: underline;
}

/* Fixed Buttons */
.fixed-buttons {
    position: fixed;
    top: 50%;
    right: 80px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 1000;
}

.btn-register,
.btn-login {
    padding: 16px 36px;
    border: none;
    border-radius: 30px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    font-family: var(--font-primary);
    min-width: 120px;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-register {
    background: var(--gradient-blue);
    color: var(--white);
}

.btn-register:hover {
    transform: translateX(-8px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.btn-login {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-login:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateX(-8px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-blue);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero {
        height: 560px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-arrow {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
    
    .hero-arrow-left {
        left: 15px;
    }
    
    .hero-arrow-right {
        right: 15px;
    }
    
    .hero-indicators {
        bottom: 20px;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid,
    .advantages-grid,
    .process-timeline,
    .statistics-grid,
    .cases-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .fixed-buttons {
        right: 20px;
        gap: 12px;
    }
    
    .btn-register,
    .btn-login {
        padding: 12px 24px;
        font-size: 1rem;
        min-width: 100px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .case-header {
        flex-direction: column;
    }
}

/* 平滑滚动优化 */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Inner pages: keep home chrome, independent body copy */
.inner-page {
    padding-top: 78px;
}

.inner-page .hero {
    height: 640px;
}

.inner-page .hero-title {
    font-size: 2.4rem;
}

.inner-page .hero-description {
    margin-bottom: 0;
}

.inner-main {
    width: min(1100px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 72px;
}

.inner-crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0 0 28px;
    font-size: 14px;
    color: var(--gray);
}

.inner-crumb a {
    color: var(--secondary-blue);
    text-decoration: none;
}

.inner-hero {
    margin: 0 0 36px;
    text-align: center;
}

.inner-hero h1 {
    margin: 0 0 12px;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--primary-blue);
}

.inner-hero-sub {
    margin: 0 0 16px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary-blue);
}

.inner-hero-lead {
    width: min(860px, 100%);
    margin: 0 auto 22px;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--gray);
}

.inner-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.inner-actions a,
.inner-note a,
.inner-entry a.inner-entry-btn {
    display: inline-block;
    padding: 10px 18px;
    background: var(--secondary-blue);
    color: var(--white);
    text-decoration: none;
    border: 1px solid var(--secondary-blue);
    border-radius: 8px;
    font-weight: 600;
}

.inner-actions a.secondary,
.inner-note a.secondary {
    background: var(--white);
    color: var(--secondary-blue);
}

.inner-note {
    margin: 36px 0 0;
    padding: 28px 24px;
    background: var(--lightest-blue);
    border-radius: 12px;
}

.inner-note h2,
.inner-copy h2,
.inner-intro h2,
.inner-range h2,
.inner-checklist-wrap h2 {
    margin: 0 0 14px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.inner-note p,
.inner-copy p,
.inner-intro p {
    margin: 0 0 12px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--dark-gray);
}

.inner-note p:last-child,
.inner-copy p:last-child,
.inner-intro p:last-child {
    margin-bottom: 0;
}

.inner-howto {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 0 0 28px;
    padding: 0;
    list-style: none;
}

.inner-howto-step {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 8px 20px;
    align-items: start;
    width: 100%;
    padding: 24px 28px;
    background: var(--light-gray);
    border-radius: 12px;
}

.inner-howto-num {
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
    color: var(--secondary-blue);
}

.inner-howto-step h2 {
    margin: 0 0 8px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.inner-howto-step p {
    margin: 0 0 10px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--dark-gray);
}

.inner-howto-step p:last-child {
    margin-bottom: 0;
}

.inner-copy {
    margin: 0 0 28px;
    padding: 28px 24px;
    background: var(--white);
    border: 1px solid var(--lightest-blue);
    border-radius: 12px;
}

.inner-faq {
    margin: 0 0 28px;
}

.inner-faq-item {
    margin: 0 0 16px;
    padding: 22px 24px;
    background: var(--light-gray);
    border-radius: 12px;
}

.inner-faq-item dt {
    margin: 0 0 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.inner-faq-item dd {
    margin: 0;
    font-size: 15px;
    line-height: 1.8;
    color: var(--dark-gray);
}

.inner-intro {
    margin: 0 0 28px;
    padding: 28px 24px;
    background: var(--light-gray);
    border-radius: 12px;
}

.inner-scenes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 0 0 28px;
}

.inner-scene {
    padding: 24px;
    background: var(--light-gray);
    border-radius: 12px;
}

.inner-scene h2 {
    margin: 0 0 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary-blue);
}

.inner-scene p {
    margin: 0;
    font-size: 15px;
    line-height: 1.8;
    color: var(--dark-gray);
}

.inner-range {
    margin: 0 0 28px;
    padding: 28px 24px;
    background: var(--white);
    border: 1px solid var(--lightest-blue);
    border-radius: 12px;
}

.inner-range ul,
.inner-checklist {
    margin: 0;
    padding-left: 22px;
    color: var(--dark-gray);
    line-height: 1.9;
}

.inner-range li,
.inner-checklist li {
    margin: 0 0 8px;
}

.inner-entry {
    margin: 0 0 28px;
    padding: 36px 28px;
    background: var(--gradient-blue);
    color: var(--white);
    text-align: center;
    border-radius: 16px;
}

.inner-entry h2 {
    margin: 0 0 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.inner-entry p {
    width: min(760px, 100%);
    margin: 0 auto 22px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--lightest-blue);
}

.inner-entry a.inner-entry-btn {
    background: var(--white);
    color: var(--primary-blue);
    border-color: var(--white);
}

.inner-checklist-wrap {
    margin: 0 0 28px;
    padding: 28px 24px;
    background: var(--light-gray);
    border-radius: 12px;
}

.not-found {
    min-height: calc(100vh - 220px);
    padding: 80px 16px 100px;
    text-align: center;
}

.not-found .code {
    margin: 0;
    font-size: 64px;
    line-height: 1;
    font-weight: 700;
    color: var(--secondary-blue);
}

.not-found h1 {
    margin: 18px 0 12px;
    font-size: 28px;
    color: var(--primary-blue);
}

.not-found p {
    max-width: 560px;
    margin: 0 auto 28px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray);
}

.not-found nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.not-found nav a {
    display: inline-block;
    padding: 10px 16px;
    border: 1px solid var(--lighter-blue);
    color: var(--secondary-blue);
    background: var(--white);
    text-decoration: none;
    border-radius: 8px;
}

.footer-bottom .site-footer-links {
    margin: 0 0 10px;
}

.footer-bottom .site-footer-links a {
    color: var(--white);
    text-decoration: none;
    margin: 0 8px;
}

.btn-register,
.btn-login {
    color: inherit;
}

@media (max-width: 768px) {
    .inner-page .hero {
        height: 440px;
    }

    .inner-page .hero-title {
        font-size: 1.6rem;
    }

    .inner-hero h1 {
        font-size: 1.5rem;
    }

    .inner-howto-step {
        grid-template-columns: 1fr;
    }

    .inner-scenes {
        grid-template-columns: 1fr;
    }
}