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

/* ===== 字体与主题变量 ===== */
:root {
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a3e;
    --bg-card: rgba(255, 255, 255, 0.06);
    --text-primary: #e0e0ff;
    --text-secondary: #a0a0c0;
    --accent-glow: #f39c12;
    --accent-soft: #f1c40f;
    --accent-alt: #e74c3c;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius-card: 24px;
    --radius-button: 40px;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-hover: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --blur-amount: 20px;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background var(--transition-base), color var(--transition-base);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body.dark-mode {
    --bg-primary: #0b0b1a;
    --bg-secondary: #12122a;
    --text-primary: #f0f0ff;
    --text-secondary: #b0b0d0;
    --bg-card: rgba(255, 255, 255, 0.04);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.06);
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-glow);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #e67e22;
}

/* ===== 头部 ===== */
header {
    background: linear-gradient(135deg, #0f0f2e 0%, #1a1a4e 50%, #0d0d1a 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: white;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-base);
}

body.dark-mode header {
    background: linear-gradient(135deg, #08081a 0%, #10102e 50%, #050510 100%);
}

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

.logo img {
    height: 44px;
    filter: drop-shadow(0 0 8px rgba(243, 156, 18, 0.3));
    transition: filter var(--transition-base);
}
.logo img:hover {
    filter: drop-shadow(0 0 16px rgba(243, 156, 18, 0.6));
}

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

.nav-menu li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    padding: 0.5rem 0.2rem;
    position: relative;
    transition: color var(--transition-base);
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-glow);
    transition: width var(--transition-hover);
    border-radius: 2px;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--accent-glow);
}
.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    width: 100%;
}

.search-box {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.search-box input {
    padding: 0.5rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-button);
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    font-size: 0.9rem;
    width: 180px;
    transition: background var(--transition-base), border-color var(--transition-base), width var(--transition-base);
}

.search-box input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-glow);
    width: 220px;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.search-box button {
    padding: 0.5rem 1.2rem;
    background: linear-gradient(135deg, var(--accent-glow), #e67e22);
    border: none;
    border-radius: var(--radius-button);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    box-shadow: 0 4px 16px rgba(243, 156, 18, 0.3);
}

.search-box button:hover {
    transform: scale(1.04);
    box-shadow: 0 6px 24px rgba(243, 156, 18, 0.5);
}

.dark-mode-toggle,
.menu-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: white;
    font-size: 1.4rem;
    cursor: pointer;
    margin-left: 0.5rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-base), transform var(--transition-base);
}

.dark-mode-toggle:hover,
.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: rotate(10deg);
}

.menu-toggle {
    display: none;
}

.breadcrumb {
    padding: 0.6rem 0 0.2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    max-width: 1200px;
    margin: 0 auto;
}
.breadcrumb a {
    color: var(--accent-glow);
    text-decoration: none;
    transition: opacity var(--transition-base);
}
.breadcrumb a:hover {
    opacity: 0.8;
}

/* ===== 主体 ===== */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

section {
    margin-bottom: 3.5rem;
    padding: 2.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-radius: var(--radius-card);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
}

section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(243, 156, 18, 0.02), transparent 60%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.6s;
}

section:hover::before {
    opacity: 1;
}

body.dark-mode section {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.05);
}

/* ===== 标题与文字 ===== */
h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
    background: linear-gradient(135deg, var(--accent-glow), #e67e22, #f1c40f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-glow), var(--accent-alt));
    border-radius: 4px;
    margin-top: 0.5rem;
}

body.dark-mode h2 {
    color: var(--text-primary);
}

h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

a {
    color: var(--accent-glow);
    text-decoration: none;
    transition: color var(--transition-base);
}
a:hover {
    color: #e67e22;
}

/* ===== Hero Banner ===== */
.hero-banner {
    position: relative;
    padding: 0;
    overflow: hidden;
    border-radius: var(--radius-card);
    background: transparent;
    border: none;
    box-shadow: none;
}

.hero-banner::before {
    display: none;
}

.banner-slider {
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.slide {
    display: none;
    transition: opacity 0.8s ease;
}
.slide.active {
    display: block;
    animation: fadeSlide 0.8s ease;
}

@keyframes fadeSlide {
    0% { opacity: 0.4; transform: scale(1.02); }
    100% { opacity: 1; transform: scale(1); }
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-card);
}

.banner-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    padding: 0 1.5rem;
    pointer-events: none;
}

.banner-controls button {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 1.8rem;
    padding: 0.6rem 1.2rem;
    cursor: pointer;
    border-radius: 50%;
    transition: background var(--transition-base), transform var(--transition-base);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.banner-controls button:hover {
    background: rgba(243, 156, 18, 0.6);
    transform: scale(1.1);
}

.banner-dots {
    text-align: center;
    padding: 1.2rem 0 0.5rem;
}

.dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    margin: 0 6px;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.dot.active {
    background: var(--accent-glow);
    transform: scale(1.3);
    box-shadow: 0 0 12px rgba(243, 156, 18, 0.5);
}

/* ===== 网格布局 ===== */
.product-grid,
.team-members,
.case-list,
.hot-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.product-card,
.member,
.case-item,
.hot-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1.8rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: transform var(--transition-hover), box-shadow var(--transition-hover), border-color var(--transition-base);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.product-card::before,
.member::before,
.case-item::before,
.hot-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(243, 156, 18, 0.05), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.product-card:hover,
.member:hover,
.case-item:hover,
.hot-item:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    border-color: rgba(243, 156, 18, 0.3);
}

.product-card:hover::before,
.member:hover::before,
.case-item:hover::before,
.hot-item:hover::before {
    opacity: 1;
}

body.dark-mode .product-card,
body.dark-mode .member,
body.dark-mode .case-item,
body.dark-mode .hot-item {
    background: rgba(255, 255, 255, 0.04);
}

.product-card img,
.member img,
.case-item img,
.hot-item img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    margin-bottom: 1.2rem;
    transition: transform var(--transition-hover);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.product-card:hover img,
.member:hover img,
.case-item:hover img,
.hot-item:hover img {
    transform: scale(1.02);
}

/* ===== FAQ ===== */
.faq-item {
    margin-bottom: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.2rem;
    transition: border-color var(--transition-base);
}

.faq-item h3 {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    padding: 0.5rem 0;
}

.faq-item h3::after {
    content: '▾';
    font-size: 1.2rem;
    color: var(--accent-glow);
    transition: transform var(--transition-base);
}

.faq-item.active h3::after {
    transform: rotate(180deg);
}

.faq-item p {
    margin-top: 0.8rem;
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent-glow);
    padding-left: 1rem;
    display: none;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(-8px); }
    100% { opacity: 1; transform: translateY(0); }
}

.faq-item button {
    background: linear-gradient(135deg, var(--accent-glow), #e67e22);
    border: none;
    color: white;
    padding: 0.4rem 1.2rem;
    border-radius: var(--radius-button);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    box-shadow: 0 4px 12px rgba(243, 156, 18, 0.3);
    margin-top: 0.5rem;
}

.faq-item button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.5);
}

/* ===== HowTo ===== */
.howto ol,
.howto ul {
    margin-left: 2rem;
    margin-bottom: 1.2rem;
    color: var(--text-secondary);
}

.howto li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.howto h3 {
    margin-top: 1.5rem;
    color: var(--accent-glow);
}

/* ===== 联系 ===== */
.contact p {
    margin-bottom: 0.6rem;
}

.qr-codes {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.qr-codes img {
    width: 100px;
    height: 100px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.qr-codes img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* ===== Footer ===== */
footer {
    background: linear-gradient(135deg, #0a0a1e, #12123a);
    color: var(--text-secondary);
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

footer p {
    margin-bottom: 0.6rem;
    font-size: 0.95rem;
}

footer a {
    color: var(--accent-glow);
    text-decoration: none;
    transition: opacity var(--transition-base);
}
footer a:hover {
    opacity: 0.8;
}

#backToTop {
    background: linear-gradient(135deg, var(--accent-glow), #e67e22);
    border: none;
    color: white;
    padding: 0.7rem 2rem;
    border-radius: var(--radius-button);
    cursor: pointer;
    margin-top: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(243, 156, 18, 0.3);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(243, 156, 18, 0.5);
}

/* ===== 动画 ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent-glow);
    display: inline-block;
}

img.loaded {
    opacity: 1;
}

img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.5s ease;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    main {
        padding: 1.5rem 1rem;
    }
    section {
        padding: 2rem 1.5rem;
    }
    h1 {
        font-size: 2.2rem;
    }
    h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    header {
        padding: 0.8rem 1rem;
    }
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 1rem;
        background: rgba(15, 15, 46, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 16px;
        padding: 1.2rem;
        border: 1px solid var(--border-color);
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-menu li a {
        padding: 0.8rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .nav-menu li:last-child a {
        border-bottom: none;
    }
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .search-box {
        width: 100%;
        margin-top: 0.8rem;
        order: 3;
    }
    .search-box input {
        flex: 1;
        width: auto;
    }
    .search-box input:focus {
        width: auto;
    }
    h1 {
        font-size: 1.8rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    .product-grid,
    .team-members,
    .case-list,
    .hot-list {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    .banner-controls button {
        font-size: 1.2rem;
        padding: 0.4rem 0.8rem;
    }
    .qr-codes {
        justify-content: center;
    }
    section {
        padding: 1.5rem 1.2rem;
        margin-bottom: 2rem;
    }
    .breadcrumb {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    main {
        padding: 1rem 0.8rem;
    }
    section {
        padding: 1.2rem 1rem;
        border-radius: 18px;
    }
    h1 {
        font-size: 1.5rem;
    }
    h2 {
        font-size: 1.3rem;
    }
    h2::after {
        width: 40px;
        height: 3px;
    }
    .logo img {
        height: 34px;
    }
    .search-box input {
        font-size: 0.85rem;
        padding: 0.4rem 1rem;
    }
    .search-box button {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
    }
    .dark-mode-toggle,
    .menu-toggle {
        width: 38px;
        height: 38px;
        font-size: 1.2rem;
    }
}