/* ===========================
   立达信安 - 公司官网样式
   =========================== */

/* 重置 & 基础 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0A6CFF;
    --primary-dark: #0050D0;
    --primary-light: #3B8DFF;
    --secondary: #00C6A7;
    --accent: #6C5CE7;
    --dark: #0B1120;
    --dark-2: #111827;
    --dark-3: #1F2937;
    --gray: #6B7280;
    --gray-light: #E5E7EB;
    --gray-bg: #F5F7FA;
    --white: #FFFFFF;
    --text: #1A1A2E;
    --text-light: #6B7280;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===========================
   导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* 2x2 网格：图标只占第一行，与「立达信安」那一行垂直居中，
   副标题留在第二行、依旧对齐在标题下方 */
.nav-logo {
    display: grid;
    grid-template-columns: auto auto;
    grid-template-rows: auto auto;
    align-items: center;
    column-gap: 10px;
    line-height: 1;
}

.logo-mark {
    grid-column: 1;
    grid-row: 1;
    display: block;
    height: 30px;
    width: auto;
}

.logo-text {
    grid-column: 2;
    grid-row: 1;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 2px;
}

.logo-sub {
    grid-column: 2;
    grid-row: 2;
    font-size: 0.6rem;
    color: var(--gray);
    letter-spacing: 3px;
    margin-top: 2px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(10, 108, 255, 0.06);
}

.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===========================
   Hero 首屏
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0B1120 0%, #0F1B3D 50%, #0A2540 100%);
    color: var(--white);
    text-align: center;
    padding: 100px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(10, 108, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 108, 255, 0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-glow {
    position: absolute;
    width: 800px;
    height: 800px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(10, 108, 255, 0.15) 0%, transparent 60%);
    animation: glow-pulse 6s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(10, 108, 255, 0.15);
    border: 1px solid rgba(10, 108, 255, 0.3);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 28px;
    letter-spacing: 4px;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, #FFFFFF 0%, #3B8DFF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: title-slide 0.8s ease-out backwards;
}

.title-line:nth-child(2) { animation-delay: 0.15s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }

@keyframes title-slide {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 48px;
    font-weight: 300;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-num {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 400;
    margin-left: 2px;
}

.stat-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(10, 108, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(10, 108, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.4), transparent);
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50% { transform: translateY(8px); opacity: 1; }
}

/* ===========================
   通用 Section
   =========================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-dark {
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%);
    color: var(--white);
}

.section-gray {
    background: var(--gray-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-dark .section-tag {
    color: var(--primary-light);
}

.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-line {
    width: 48px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 0 auto;
}

.section-subtitle {
    margin-top: 16px;
    font-size: 1rem;
    color: var(--text-light);
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.6);
}

/* ===========================
   关于我们
   =========================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-light);
}

.about-lead {
    font-size: 1.15rem;
    color: var(--text);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-lead strong {
    color: var(--primary);
}

.about-text p {
    margin-bottom: 20px;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.tag {
    padding: 6px 18px;
    background: rgba(10, 108, 255, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: rgba(10, 108, 255, 0.15);
    transform: translateY(-2px);
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-card {
    padding: 28px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(10, 108, 255, 0.2);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.card-icon svg {
    width: 24px;
    height: 24px;
}

.about-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===========================
   技术优势
   =========================== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 64px;
}

.tech-card {
    padding: 36px 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(10, 108, 255, 0.3);
    transform: translateY(-4px);
}

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

.tech-num {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-light);
    letter-spacing: 4px;
    margin-bottom: 20px;
}

.tech-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(10, 108, 255, 0.15), rgba(108, 92, 231, 0.15));
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.tech-icon svg {
    width: 28px;
    height: 28px;
}

.tech-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--white);
}

.tech-card p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.tech-highlight {
    display: inline-block;
    margin-top: 16px;
    padding: 4px 14px;
    background: rgba(0, 198, 167, 0.15);
    color: var(--secondary);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
}

.tech-banner {
    display: flex;
    justify-content: center;
    gap: 64px;
    padding: 36px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
}

.banner-item {
    text-align: center;
}

.banner-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.banner-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

/* ===========================
   核心产品
   =========================== */
.product-block {
    margin-bottom: 80px;
}

.product-block:last-child {
    margin-bottom: 0;
}

.product-header {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 36px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--gray-light);
}

.product-num {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    opacity: 0.15;
}

.product-name {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
}

.product-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-left: auto;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.product-features.single {
    grid-template-columns: 1fr;
}

.feature-card {
    padding: 36px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.feature-card.full {
    max-width: 100%;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(10, 108, 255, 0.2);
    transform: translateY(-2px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 26px;
    height: 26px;
}

.feature-card h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-card ul {
    margin-bottom: 16px;
}

.feature-card ul li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--text);
    position: relative;
    padding-left: 20px;
}

.feature-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

.feature-card ul li strong {
    color: var(--primary);
}

.feature-detail {
    padding: 16px;
    background: var(--gray-bg);
    border-radius: var(--radius);
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* AI 流程图 */
.ai-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 28px 0;
    gap: 12px;
}

.flow-item {
    flex: 1;
    text-align: center;
    padding: 20px 12px;
    background: linear-gradient(135deg, rgba(10, 108, 255, 0.06), rgba(108, 92, 231, 0.06));
    border-radius: var(--radius);
    border: 1px solid rgba(10, 108, 255, 0.1);
}

.flow-step {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.flow-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.flow-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 300;
}

.ai-metrics {
    display: flex;
    gap: 24px;
    margin-top: 20px;
}

.metric {
    flex: 1;
    text-align: center;
    padding: 16px;
    background: linear-gradient(135deg, rgba(0, 198, 167, 0.08), rgba(10, 108, 255, 0.08));
    border-radius: var(--radius);
}

.metric-num {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===========================
   创新成果
   =========================== */
.innovation-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.innovation-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.innovation-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.inn-num {
    font-size: 3.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.inn-small {
    font-size: 1.2rem;
    opacity: 0.6;
}

.inn-label {
    font-size: 0.95rem;
    color: var(--text);
    font-weight: 500;
    margin-top: 12px;
}

.inn-bar {
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin-top: 20px;
    width: 0;
    transition: width 0.8s ease;
}

.innovation-card:hover .inn-bar {
    width: 60%;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   市场分析
   =========================== */
.market-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.market-card {
    padding: 36px 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.market-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(10, 108, 255, 0.3);
    transform: translateY(-4px);
}

.market-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(10, 108, 255, 0.15), rgba(0, 198, 167, 0.15));
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.market-icon svg {
    width: 26px;
    height: 26px;
}

.market-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--white);
}

.market-card p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* ===========================
   联系我们
   =========================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.contact-item:hover {
    box-shadow: var(--shadow);
    border-color: rgba(10, 108, 255, 0.2);
}

.contact-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.88rem;
    color: var(--text-light);
}

.contact-cta {
    display: flex;
    align-items: center;
}

.cta-card {
    width: 100%;
    padding: 48px;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
    border-radius: var(--radius-lg);
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
    background: radial-gradient(circle, rgba(10, 108, 255, 0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.cta-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
}

.cta-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 24px;
    position: relative;
}

.cta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    position: relative;
}

.cta-tags span {
    padding: 6px 16px;
    background: rgba(10, 108, 255, 0.15);
    border: 1px solid rgba(10, 108, 255, 0.25);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--primary-light);
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    margin-bottom: 40px;
}

/* 与导航栏同理：图标对齐「立达信安」标题行，英文副标留在下方。
   justify-content: start 是必须的——这个 grid 宽度会撑满父列，
   否则 auto 轨道会吸收剩余空间把图标那一列拉宽，间距就不再等于 column-gap */
.footer-logo {
    display: grid;
    grid-template-columns: auto auto;
    grid-template-rows: auto auto;
    justify-content: start;
    align-items: center;
    column-gap: 14px;
}

.footer-logo .logo-mark {
    grid-column: 1;
    grid-row: 1;
    height: 46px;
}

.footer-logo h3 {
    grid-column: 2;
    grid-row: 1;
}

.footer-logo p {
    grid-column: 2;
    grid-row: 2;
}

.footer-brand h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 2px;
}

/* 此处域名按原始小写显示，不做大写转换 */
.footer-brand p {
    font-size: 0.7rem;
    letter-spacing: 3px;
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-slogan {
    display: block;
    margin-top: 16px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    padding: 4px 0;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===========================
   滚动动画
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   响应式
   =========================== */
@media (max-width: 968px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px;
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
        gap: 4px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.2rem;
        letter-spacing: 2px;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-num {
        font-size: 1.6rem;
    }

    .stat-divider {
        display: none;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .tech-banner {
        flex-direction: column;
        gap: 24px;
    }

    .product-features {
        grid-template-columns: 1fr;
    }

    .product-header {
        flex-wrap: wrap;
    }

    .product-desc {
        margin-left: 0;
        width: 100%;
    }

    .innovation-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .market-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .ai-flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .innovation-grid {
        grid-template-columns: 1fr;
    }

    .market-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .ai-metrics {
        flex-direction: column;
    }
}

/* ===========================
   攻击分析报告采购
   =========================== */
.report-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 64px;
}

.report-card {
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.report-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(10, 108, 255, 0.2);
}

.report-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.report-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(10, 108, 255, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.report-format {
    font-size: 0.8rem;
    color: var(--text-light);
}

.report-title {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 12px;
    color: var(--text);
}

.report-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
    flex: 1;
}

.report-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.report-price {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
}

.report-detail-btn {
    display: inline-block;
    padding: 10px 22px;
    border-radius: 100px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(10, 108, 255, 0.35);
    transition: var(--transition);
}

.report-detail-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(10, 108, 255, 0.5);
}

.report-process {
    margin-bottom: 56px;
}

.report-subtitle {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
}

.report-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.report-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.report-step:hover {
    box-shadow: var(--shadow);
    border-color: rgba(10, 108, 255, 0.2);
}

.report-step-num {
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.report-step strong {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.report-step p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* 详情弹窗 */
.report-modal {
    border: none;
    border-radius: var(--radius-lg);
    padding: 0;
    color: var(--text);
    width: min(720px, calc(100% - 28px));
    max-height: 90vh;
    margin: auto;
    box-shadow: var(--shadow-lg);
}

.report-modal::backdrop {
    background: rgba(11, 17, 32, 0.55);
    backdrop-filter: blur(4px);
}

.report-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 26px;
    border-bottom: 1px solid var(--gray-light);
}

.report-modal-head h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0;
    padding-right: 16px;
    line-height: 1.5;
}

.report-modal-close {
    border: none;
    background: var(--gray-bg);
    color: var(--text-light);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    transition: var(--transition);
}

.report-modal-close:hover {
    background: rgba(10, 108, 255, 0.1);
    color: var(--primary);
}

.report-modal-body {
    padding: 22px 26px;
}

.report-detail-meta {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.report-detail-summary {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 20px;
}

.report-content-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.report-content-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.report-lock-area {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    margin-top: 12px;
    min-height: 88px;
}

.report-lock-area .report-content-list {
    filter: blur(6px);
    user-select: none;
    pointer-events: none;
}

.report-lock-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.45);
}

.report-lock-icon {
    width: 30px;
    height: 30px;
    color: var(--primary);
}

.report-content-list li {
    position: relative;
    padding-left: 18px;
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.7;
}

.report-content-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

/* 付款面板 + 二维码占位 */
.payment-panel {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 24px;
    padding: 22px 26px;
    margin: 0 26px 26px;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    background: var(--gray-bg);
}

.payment-copy h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.payment-copy p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.payment-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.payment-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.payment-done-btn {
    display: inline-block;
    padding: 11px 22px;
    border-radius: 100px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    background: var(--secondary);
    color: var(--white);
    transition: var(--transition);
}

.payment-done-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 198, 167, 0.4);
}

.payment-hint {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-top: 14px;
    line-height: 1.6;
}

.payment-done-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    line-height: 1.6;
}

.payment-done-tip {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.8;
}

.payment-done-tip a {
    color: var(--primary);
    font-weight: 600;
}

.payment-code {
    text-align: center;
}

.qr-placeholder {
    width: 164px;
    height: 164px;
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    margin: 0 auto 10px;
    display: grid;
    place-items: center;
    overflow: hidden;
}

.qr-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.payment-code small {
    font-size: 0.72rem;
    color: var(--text-light);
}

/* 报告采购 - 响应式 */
@media (max-width: 968px) {
    .report-grid {
        grid-template-columns: 1fr;
    }

    .report-steps {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 600px) {
    .report-card {
        padding: 24px;
    }

    .report-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .report-detail-btn,
    .payment-done-btn {
        width: 100%;
        text-align: center;
    }

    .payment-panel {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .qr-placeholder {
        width: 140px;
        height: 140px;
    }
}