/* ===================================================================
   DNF 一条龙 · 重构版样式
   视觉/交互对标 qk.onfa.cc,内容针对 DNF 开服业务
   =================================================================== */

/* =============== Local Fonts =============== */
/* Inter Variable Font (latin subset) — 自托管,5 weight 一份文件 */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 300 700;
    font-display: swap;
    src: url('../fonts/Inter-latin.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-800: #334155;
    --gray-700: #475569;
    --gray-600: #475569;
    --gray-500: #64748b;
    --gray-400: #94a3b8;
    --gray-300: #cbd5e1;
    --gray-200: #e2e8f0;
    --gray-100: #f1f5f9;
    --gray-50: #f8fafc;
    --white: #ffffff;
    --green: #10b981;
    --green-dark: #059669;
    --docs-blue: #0ea5e9;
    --docs-blue-dark: #0284c7;
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", "Courier New", monospace;
    --nav-h: 64px;
}

/* =============== Reset & Base =============== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: var(--font-base);
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.6;
    font-synthesis: none;
}
html, body, input, textarea, button, select { font-family: var(--font-base); }

img, svg { max-width: 100%; display: block; }
ul { list-style: none; padding: 0; margin: 0; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4, h5, h6, p { margin: 0; }

section[id] { scroll-margin-top: 90px; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* =============== 顶栏 Nav =============== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    padding: 14px 0;
    transition: background .25s ease, border-color .25s ease, box-shadow .25s ease, padding .25s ease;
}
.nav.is-scrolled {
    background: rgba(255, 255, 255, 0.94);
    border-bottom-color: var(--gray-200);
    box-shadow: 0 4px 20px -8px rgba(15, 23, 42, 0.12);
    padding: 10px 0;
}
.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary);
    font-size: 20px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.01em;
    padding: 6px 0;
}
.nav-brand:hover { color: var(--primary); }
.nav-brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.28);
    flex: 0 0 auto;
}
.nav-brand-text {
    color: var(--primary);
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-link {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 2px;
    position: relative;
    transition: color .2s ease;
}
.nav-link::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .25s ease;
}
.nav-link:hover,
.nav-link:focus-visible {
    color: var(--primary);
}
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.is-active::after {
    transform: scaleX(1);
}
.nav-link.is-active { color: var(--primary); }
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    padding: 9px 18px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
    box-shadow: 0 4px 14px -4px rgba(99, 102, 241, 0.55);
}
.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px -6px rgba(99, 102, 241, 0.55);
}
.nav-divider {
    width: 1px;
    height: 18px;
    background: var(--gray-200);
    margin: 0 4px;
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--gray-200);
    background: var(--white);
    border-radius: 8px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: background .2s, border-color .2s;
}
.nav-toggle:hover { background: var(--gray-50); border-color: var(--gray-300); }
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: transform .2s, opacity .2s;
}
.nav.is-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============== Buttons =============== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all .2s;
    border: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary);
    color: var(--white);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    color: var(--white);
    box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.4);
}
.btn-success {
    background: var(--green);
    color: var(--white);
}
.btn-success:hover {
    background: var(--green-dark);
    transform: translateY(-2px);
    color: var(--white);
    box-shadow: 0 8px 20px -4px rgba(16, 185, 129, 0.4);
}
.btn-docs {
    background: var(--docs-blue);
    color: var(--white);
}
.btn-docs:hover {
    background: var(--docs-blue-dark);
    transform: translateY(-2px);
    color: var(--white);
    box-shadow: 0 8px 20px -4px rgba(14, 165, 233, 0.4);
}

/* =============== Hero =============== */
.hero {
    padding: calc(var(--nav-h) + 56px) 24px 100px;
    background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
}
.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -.02em;
}
.hero-text h1 span { color: var(--primary); }
.hero-text p {
    font-size: 17px;
    color: var(--gray-600);
    margin-bottom: 32px;
    line-height: 1.75;
}
.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.hero-stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.hero-stat-card {
    padding: 22px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
    transition: all .3s;
}
.hero-stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px -8px rgba(99, 102, 241, 0.18);
    border-color: var(--primary);
}
.hero-stat-card-accent {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-color: transparent;
    color: var(--white);
}
.hero-stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
    letter-spacing: -.02em;
}
.hero-stat-num small {
    font-size: 16px;
    font-weight: 600;
    margin-left: 2px;
}
.hero-stat-card-accent .hero-stat-num { color: var(--white); }
.hero-stat-label {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 4px;
    font-weight: 500;
}
.hero-stat-card-accent .hero-stat-label { color: rgba(255, 255, 255, 0.85); }

.hero-version-card {
    padding: 22px 24px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}
.hero-version-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.hero-version-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
}
.hero-version-tag {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    padding: 3px 10px;
    border-radius: 999px;
    letter-spacing: .5px;
}
.hero-version-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.hero-version-chip {
    padding: 6px 12px;
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: 13px;
    font-weight: 500;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}
.hero-version-chip-hot {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border-color: transparent;
    font-weight: 600;
}

/* =============== Section =============== */
.section {
    padding: 100px 24px;
}
.section-gray {
    background: var(--gray-100);
}
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -.02em;
}
.section-title p {
    font-size: 18px;
    color: var(--gray-500);
}

/* =============== Pricing =============== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}
.pricing-card {
    padding: 32px 28px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    text-align: center;
    transition: all .3s;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -12px rgba(15, 23, 42, 0.12);
    border-color: var(--primary);
}
.pricing-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--white) 0%, #faf9ff 100%);
    box-shadow: 0 12px 32px -8px rgba(99, 102, 241, 0.25);
}
.pricing-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    line-height: 1;
}
.pricing-icon svg {
    width: 100%;
    height: 100%;
    display: block;
}
.pricing-card.featured .pricing-icon { color: var(--primary); }
.pricing-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.pricing-tag {
    display: inline-block;
    padding: 2px 10px;
    font-size: 11px;
    font-weight: 700;
    line-height: 1.5;
    border-radius: 999px;
    letter-spacing: .5px;
    vertical-align: middle;
}
.pricing-tag-hot {
    background: linear-gradient(135deg, #f25767 0%, #ff6b81 100%);
    color: var(--white);
}
.pricing-tag-rec {
    background: var(--primary);
    color: var(--white);
}
.pricing-price {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 12px;
    letter-spacing: -.02em;
}
.pricing-price span {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 500;
    margin-left: 4px;
    letter-spacing: 0;
}

.pricing-list {
    text-align: left;
    margin: 8px 0 24px;
    padding: 16px 18px;
    background: var(--gray-50);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    width: 100%;
}
.pricing-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 7px 0;
    font-size: 13px;
    line-height: 1.5;
}
.pricing-row + .pricing-row { border-top: 1px solid var(--gray-200); }
.pricing-label {
    flex-shrink: 0;
    color: var(--gray-500);
    font-weight: 500;
}
.pricing-value {
    color: var(--gray-800);
    font-weight: 600;
    text-align: right;
    word-break: break-word;
    overflow-wrap: anywhere;
    line-height: 1.45;
}

.pricing-cta {
    display: inline-flex;
    margin-top: 4px;
    padding: 10px 22px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 999px;
    background: var(--gray-100);
    color: var(--primary);
    border: 1px solid var(--gray-200);
    transition: all .2s;
    align-self: center;
}
.pricing-cta:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.35);
}
.pricing-card.featured .pricing-cta {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.pricing-card.featured .pricing-cta:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* 至尊 banner */
.addons-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 24px;
    padding: 40px 48px;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px -12px rgba(99, 102, 241, 0.45);
}
.addons-badge {
    position: absolute;
    top: 18px;
    right: 22px;
    padding: 5px 14px;
    background: linear-gradient(135deg, #ffbe3d 0%, #f25767 100%);
    color: var(--white);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 999px;
    z-index: 2;
    box-shadow: 0 6px 16px -4px rgba(242, 87, 103, 0.5);
}
.addons-card::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, .12) 0%, transparent 60%);
    pointer-events: none;
}
.addons-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
    position: relative;
}
.addons-subtitle {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 24px;
    font-size: 15px;
    position: relative;
}
.addons-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 28px;
    position: relative;
}
.addon-item {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--white);
    transition: all .2s;
}
.addon-item:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}
.addons-price {
    font-size: 42px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 24px;
    letter-spacing: -.02em;
    position: relative;
}
.addons-price span {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    margin-left: 4px;
}
.addons-card .btn-primary {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.2);
    position: relative;
}
.addons-card .btn-primary:hover {
    background: var(--white);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -4px rgba(0, 0, 0, 0.3);
}

/* =============== Features =============== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    padding: 32px 28px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all .3s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px -12px rgba(15, 23, 42, 0.12);
    border-color: var(--primary);
}
.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(99, 102, 241, 0.04));
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
    line-height: 1;
}
.icon-shield::before { content: "🛡️"; }
.icon-versions::before { content: "🎮"; }
.icon-tools::before { content: "🛠️"; }
.icon-support::before { content: "⏱️"; }
.icon-test::before { content: "✅"; }
.icon-boutique::before { content: "👑"; }
.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}
.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 14px;
}
.feature-card p a {
    color: var(--primary);
    font-weight: 500;
    border-bottom: 1px dashed currentColor;
}

/* =============== Process =============== */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}
.process-step {
    text-align: center;
    padding: 20px 16px;
}
.process-step-num {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    transition: all .3s;
}
.process-step:hover .process-step-num {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.1);
    box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.4);
}
.process-step h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.process-step p {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.6;
}
.process-trust {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    padding: 20px 24px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    max-width: 720px;
    margin: 0 auto;
}
.process-trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}
.process-trust-icon { font-size: 18px; }

/* =============== Contact =============== */
.contact-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}
.contact-info { padding: 20px 0; }
.contact-desc {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.9;
    margin-bottom: 32px;
}
.contact-desc strong { color: var(--dark); font-weight: 600; }
.contact-qq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.contact-qq-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-200);
    transition: all .25s;
    cursor: pointer;
    user-select: none;
}
.contact-qq-item:hover {
    transform: translateX(6px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}
.qq-icon { font-size: 24px; }
.qq-label {
    font-size: 15px;
    color: var(--gray-500);
    font-weight: 500;
}
.qq-number {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
    letter-spacing: 1px;
}
.copy-tip {
    margin-left: auto;
    font-size: 13px;
    color: var(--gray-400);
}
.contact-qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
}
.qrcode-wrapper {
    background: var(--white);
    padding: 24px;
    border-radius: 20px;
    box-shadow: 0 16px 40px -8px rgba(15, 23, 42, 0.15);
    text-align: center;
    border: 1px solid var(--gray-200);
}
.qrcode-img {
    width: 200px;
    height: 200px;
    border-radius: 12px;
}
.qrcode-tip {
    font-size: 14px;
    color: var(--gray-600);
    margin-top: 12px;
    font-weight: 500;
}

/* =============== Footer =============== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 24px 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}
.footer-brand-col { max-width: 360px; }
.footer-brand-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}
.footer-brand-logo {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}
.footer-brand {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}
.footer-desc {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    font-size: 14px;
}
.footer-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: .02em;
}
.footer-links li { margin-bottom: 4px; }
.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color .2s;
    display: inline-block;
    padding: 6px 0;
    min-height: 28px;
    line-height: 1.4;
}
.footer-link:hover, .footer-link:focus-visible {
    color: var(--white);
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 16px;
}
.footer-copyright {
    color: rgba(255, 255, 255, 0.45);
    font-size: 13px;
}
.beian {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 13px;
    padding: 4px 0;
}
.beian img { display: block; }
.beian:hover { color: var(--white); }

/* =============== Responsive =============== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-text h1 { font-size: 40px; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
    .footer-brand-col { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }

    .hero { padding: calc(var(--nav-h) + 16px) 16px 56px; }
    .section { padding: 64px 16px; }
    .section-title h2 { font-size: 26px; }
    .section-title p { font-size: 16px; }
    .section-title { margin-bottom: 40px; }

    /* Mobile nav: smaller brand, hide inline menu, show toggle, expose drawer */
    .nav-brand { font-size: 18px; gap: 8px; }
    .nav-brand-logo { width: 30px; height: 30px; border-radius: 7px; }
    .nav-menu { display: none; }
    .nav-toggle { display: inline-flex !important; }
    .nav-divider, .nav-cta { display: none; }
    .nav.is-open { background: rgba(255, 255, 255, 0.98); }
    .nav.is-open .nav-menu {
        display: flex;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: saturate(180%) blur(14px);
        -webkit-backdrop-filter: saturate(180%) blur(14px);
        border-top: 1px solid var(--gray-200);
        padding: 8px 16px;
        max-height: calc(100vh - var(--nav-h));
        overflow-y: auto;
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    }
    .nav.is-open .nav-menu .nav-link,
    .nav.is-open .nav-menu .nav-cta { width: 100%; }
    .nav.is-open .nav-menu .nav-divider { display: none; }
    .nav.is-open .nav-link {
        display: block;
        padding: 14px 4px;
        font-size: 16px;
        width: 100%;
        border-bottom: 1px solid var(--gray-100);
    }
    .nav.is-open .nav-link::after { display: none; }
    .nav.is-open .nav-link.is-active {
        color: var(--primary);
        background: var(--gray-100);
        border-radius: 8px;
        padding-left: 12px;
        padding-right: 12px;
    }
    .nav.is-open .nav-cta {
        margin-top: 8px;
        display: block;
        text-align: center;
        padding: 12px 18px;
    }

    .hero-text h1 { font-size: 32px; }
    .hero-text p { font-size: 15px; }
    .hero-buttons { gap: 10px; }
    .hero-buttons .btn {
        flex: 1 1 calc(50% - 5px);
        min-width: 0;
        max-width: calc(50% - 5px);
        padding: 12px 12px;
        font-size: 13px;
    }
    .hero-buttons .btn-docs {
        flex-basis: 100%;
        max-width: 100%;
    }

    .hero-stat-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .hero-stat-card { padding: 16px 14px; }
    .hero-stat-num { font-size: 24px; }

    .pricing-grid { grid-template-columns: 1fr; gap: 16px; }
    .feature-grid { grid-template-columns: 1fr; gap: 16px; }
    .addons-card { padding: 28px 20px; }
    .addons-list { gap: 8px; }

    .process-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .process-trust {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
        align-items: stretch;
        text-align: center;
    }
    .process-trust-item { justify-content: center; }

    .contact-content { grid-template-columns: 1fr; gap: 32px; }
    .contact-info { padding: 0; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer { padding: 40px 18px 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .hero-text h1 { font-size: 28px; }
    .section-title h2 { font-size: 22px; }
    .section-title { margin-bottom: 36px; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn,
    .hero-buttons .btn-docs { width: 100%; max-width: 100%; flex-basis: auto; }
    .process-grid { grid-template-columns: 1fr; }
    .pricing-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 10px 0;
    }
    .pricing-value { text-align: left; }
    .contact-qq-item { padding: 14px 16px; }
    .contact-qq-item .qq-number { font-size: 18px; }
}

/* =============== Print =============== */
@media print {
    body { font-size: 12pt; line-height: 1.5; color: #000; }
    .nav, .footer, .hero-buttons, .btn, .process-trust { display: none !important; }
    .section, .contact-content { page-break-inside: avoid; }
    a { text-decoration: underline; }
    a[href]:after { content: " (" attr(href) ")"; }
}