/* ===== 全局重置与基础 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a1a2e;
    --secondary: #e94560;
    --accent: #0f3460;
    --light: #f5f5f5;
    --dark: #121212;
    --card-bg: rgba(255, 255, 255, 0.85);
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text: #1a1a2e;
    --text-light: #555;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
    --primary: #0d0d1a;
    --secondary: #ff6b6b;
    --accent: #1a3a5c;
    --light: #1e1e2e;
    --dark: #f5f5f5;
    --card-bg: rgba(30, 30, 50, 0.85);
    --glass-bg: rgba(0, 0, 0, 0.25);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #e0e0e0;
    --text-light: #aaa;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: var(--font);
    background: var(--light);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
}

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

a:hover, a:focus {
    color: var(--accent);
    text-decoration: underline;
}

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

ul, ol {
    list-style: none;
    padding: 0;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font: inherit;
    color: inherit;
}

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

/* ===== 滚动动画基础 ===== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 头部 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition), border var(--transition);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
}

.logo svg {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
}

.logo-text small {
    font-size: 0.65rem;
    font-weight: 400;
    display: block;
    color: var(--text-light);
    letter-spacing: 1px;
}

.main-nav ul {
    display: flex;
    gap: 28px;
}

.main-nav a {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 4px 0;
}

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

.main-nav a:hover::after,
.main-nav a:focus::after {
    width: 100%;
}

.header-actions {
    display: flex;
    gap: 12px;
}

.header-actions button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.header-actions button:hover {
    background: var(--secondary);
    color: #fff;
    transform: scale(1.1);
}

/* ===== Hero ===== */
.hero {
    padding: 140px 20px 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
    background-size: 400% 400%;
    animation: gradientShift 12s ease infinite;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    min-height: 85vh;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233, 69, 96, 0.15) 0%, transparent 60%);
    animation: pulseGlow 8s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}

.hero-content {
    flex: 1;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 500px;
}

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

.btn-primary, .btn-secondary {
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--secondary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
    background: #d63850;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(233, 69, 96, 0.5);
    text-decoration: none;
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: #fff;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-3px);
    text-decoration: none;
}

.hero-visual {
    flex: 1;
    max-width: 450px;
    position: relative;
    z-index: 1;
}

.hero-visual svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 40px rgba(0,0,0,0.3));
    border-radius: var(--radius);
}

/* ===== 通用区块 ===== */
section {
    padding: 80px 0;
}

section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ===== About ===== */
.about {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    margin: 20px;
    padding: 60px 40px;
    box-shadow: var(--shadow);
}

.about p {
    max-width: 800px;
    margin: 0 auto 20px;
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-light);
}

.about-meta {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.about-meta span {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    font-size: 0.95rem;
}

.about-meta strong {
    display: block;
    font-size: 0.8rem;
    color: var(--secondary);
    margin-bottom: 4px;
}

/* ===== Card Grid ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    transition: all var(--transition);
    cursor: default;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
    border-color: var(--secondary);
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text);
}

.card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

.card time {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 12px 0 8px;
}

.card a {
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-block;
    margin-top: 8px;
}

/* ===== Services ===== */
.services ul {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.services li {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 18px 24px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    transition: all var(--transition);
    font-size: 1rem;
}

.services li:hover {
    transform: translateX(8px);
    border-color: var(--secondary);
}

.services li strong {
    color: var(--secondary);
}

/* ===== Testimonials ===== */
.testimonials {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 80px 20px;
}

.testimonials h2::after {
    background: #fff;
}

blockquote {
    max-width: 600px;
    margin: 20px auto;
    padding: 24px 32px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    border-left: 4px solid var(--secondary);
    font-style: italic;
    font-size: 1.05rem;
    transition: all var(--transition);
}

blockquote:hover {
    transform: scale(1.02);
    background: rgba(255,255,255,0.12);
}

blockquote p::before {
    content: '"';
    font-size: 2rem;
    color: var(--secondary);
    margin-right: 4px;
}

blockquote p::after {
    content: '"';
    font-size: 2rem;
    color: var(--secondary);
    margin-left: 4px;
}

/* ===== Insights ===== */
.insights .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ===== FAQ ===== */
.faq {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius);
    margin: 20px;
    padding: 60px 40px;
    box-shadow: var(--shadow);
}

.faq-item {
    border-bottom: 1px solid var(--glass-border);
    padding: 8px 0;
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 16px 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform var(--transition);
    color: var(--secondary);
}

.faq-question[aria-expanded="true"]::after {
    transform: rotate(45deg);
}

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

.faq-answer {
    padding: 0 0 16px;
    color: var(--text-light);
    line-height: 1.7;
}

.faq-answer[hidden] {
    display: none;
}

/* ===== HowTo ===== */
.howto ol {
    max-width: 700px;
    margin: 0 auto;
    counter-reset: step;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.howto li {
    counter-increment: step;
    padding: 18px 24px 18px 60px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    position: relative;
    transition: all var(--transition);
    font-size: 1rem;
}

.howto li::before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: var(--secondary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.howto li:hover {
    transform: translateX(8px);
    border-color: var(--secondary);
}

.howto li strong {
    color: var(--secondary);
}

/* ===== Contact ===== */
.contact address {
    max-width: 500px;
    margin: 0 auto;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    font-style: normal;
    line-height: 2;
}

.contact address p {
    font-size: 1rem;
}

.contact address strong {
    display: inline-block;
    min-width: 100px;
    color: var(--secondary);
}

/* ===== Footer ===== */
.site-footer {
    background: var(--primary);
    color: #ccc;
    padding: 60px 20px 30px;
    margin-top: 40px;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.footer-col p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-col a {
    color: #aaa;
    font-size: 0.9rem;
}

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

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary);
    color: #fff;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(233, 69, 96, 0.5);
}

/* ===== Search Modal ===== */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 2000;
}

.search-modal.open {
    opacity: 1;
    visibility: visible;
}

.search-inner {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    display: flex;
    gap: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.search-inner input {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: var(--glass-bg);
    color: var(--text);
    font-size: 1rem;
    outline: none;
    transition: border var(--transition);
}

.search-inner input:focus {
    border-color: var(--secondary);
}

.search-close {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--secondary);
    color: #fff;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.search-close:hover {
    background: #d63850;
    transform: scale(1.05);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 120px 20px 60px;
        min-height: auto;
    }
    .hero-content {
        max-width: 100%;
    }
    .hero-content p {
        margin: 0 auto 32px;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-visual {
        max-width: 350px;
    }
    .hero-content h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }
    .main-nav {
        display: none;
    }
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .hero {
        padding: 100px 16px 40px;
    }
    section {
        padding: 50px 0;
    }
    section h2 {
        font-size: 1.6rem;
    }
    .about, .faq {
        margin: 10px;
        padding: 30px 20px;
    }
    .about-meta {
        gap: 16px;
    }
    .about-meta span {
        flex: 1 1 40%;
        text-align: center;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }
    .search-inner {
        flex-direction: column;
    }
    .search-close {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 280px;
    }
    .card {
        padding: 24px 16px;
    }
    .howto li {
        padding: 16px 16px 16px 52px;
    }
    .howto li::before {
        left: 12px;
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
}

/* ===== 暗色模式额外调整 ===== */
[data-theme="dark"] .site-header {
    border-bottom-color: rgba(255,255,255,0.05);
}

[data-theme="dark"] .card {
    background: rgba(30, 30, 50, 0.7);
}

[data-theme="dark"] .about,
[data-theme="dark"] .faq {
    background: rgba(30, 30, 50, 0.6);
}

[data-theme="dark"] .search-inner input {
    background: rgba(0, 0, 0, 0.3);
    color: #e0e0e0;
}

[data-theme="dark"] .search-modal {
    background: rgba(0, 0, 0, 0.8);
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d63850;
}

/* ===== 焦点样式 ===== */
:focus-visible {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

/* ===== 打印样式 ===== */
@media print {
    .site-header {
        position: static;
        backdrop-filter: none;
    }
    .hero {
        background: #1a1a2e;
        animation: none;
    }
    .back-to-top, .search-modal, .header-actions {
        display: none;
    }
}