/* === Global reset & variables === */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', 'Segoe UI', Roboto, system-ui, sans-serif;
        }

        body {
            background-color: #FEF9F2;
            color: #2E241F;
            line-height: 1.5;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background-image: 
                linear-gradient(45deg, rgba(255, 140, 0, 0.02) 1px, transparent 1px),
                linear-gradient(-45deg, rgba(255, 140, 0, 0.02) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: -1;
        }

        :root {
            --primary-warm: #F97316;
            --primary-light: #FFB26B;
            --accent-deep: #A6510C;
            --gray-warm: #F5E8D9;
            --card-bg: rgba(255, 245, 235, 0.7);
            --text-dark: #2E241F;
            --text-soft: #5A4A3C;
            --border-soft: rgba(249, 115, 22, 0.15);
            --shadow-light: 0 8px 20px rgba(249, 115, 22, 0.08);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* Section titles (通用) */
        .section-title {
            font-size: 2.4rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 70px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-warm), #FFD966);
            border-radius: 4px;
        }
        .section-subhead {
            font-size: 1.15rem;
            color: var(--text-soft);
            margin: 1.5rem 0 3rem 0;
            padding-left: 1rem;
            border-left: 3px solid var(--primary-warm);
            background: linear-gradient(90deg, rgba(249,115,22,0.02), transparent);
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 248, 240, 0.9);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-soft);
            z-index: 1000;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--primary-warm);
            font-weight: 300;
            background: linear-gradient(145deg, #F97316, #FFAA4E);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            gap: 2.5rem;
            font-weight: 500;
            color: var(--text-dark);
        }
        .nav-menu a {
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .nav-menu a:hover {
            border-bottom-color: var(--primary-warm);
            color: var(--primary-warm);
        }

        /* 页脚 */
        .footer {
            background: #2C1F15;
            color: #F0DDCC;
            padding: 3rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 600;
            color: #FFD8B0;
            margin-bottom: 1rem;
        }
        .footer-logo small {
            font-size: 0.8rem;
            color: var(--primary-light);
        }
        .footer-nav h4, .footer-contact h4, .footer-qr h4 {
            color: #FFC8A0;
            margin-bottom: 1.2rem;
            font-weight: 500;
        }
        .footer-nav ul {
            list-style: none;
        }
        .footer-nav li {
            margin-bottom: 0.7rem;
        }
        .footer-nav a:hover {
            color: var(--primary-warm);
        }
        .footer-contact p {
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--primary-warm);
        }
        .qr-img {
            width: 100px;
            height: 100px;
            background: #4A3A2C;
            border-radius: 8px;
            border: 1px solid #F97316;
        }
        .qr-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 6px;
        }
        .copyright {
            text-align: center;
            padding-top: 3rem;
            margin-top: 2rem;
            border-top: 1px solid #5F4A38;
            font-size: 0.9rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            margin: 1.5rem 0 0;
        }
        .friend-links a:hover {
            color: var(--primary-warm);
        }

        /* 滚动淡入通用类 */
        .fade-in-section {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .fade-in-section.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 板块上下间距 (全局) */
        section:not(.carousel):not(.navbar):not(.footer) {
            padding: 70px 0;
        }

        /* 公共响应式调整 (导航、页脚、容器) */
        @media (max-width: 992px) {
            .nav-menu { gap: 1.2rem; }
            .footer-container { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-container { flex-direction: column; height: auto; padding: 15px; }
            .nav-menu { flex-wrap: wrap; justify-content: center; }
            section:not(.carousel):not(.navbar):not(.footer) {
                padding: 40px 0;
            }
            .section-subhead {
                margin-bottom: 2rem;
            }
        }