/* ============================================
   浙江元皓科技有限公司 - 主样式表
   ============================================ */

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

:root {
    --primary: #1a6df5;
    --primary-dark: #0d4fc4;
    --primary-light: #e8f1fe;
    --primary-gradient: linear-gradient(135deg, #1a6df5 0%, #0d4fc4 100%);
    --accent: #00c9a7;
    --accent-gradient: linear-gradient(135deg, #00c9a7 0%, #00b894 100%);
    --dark: #1a1a2e;
    --dark-secondary: #2d2d44;
    --text: #24292f;
    --text-secondary: #4a5568;
    --text-light: #64748b;
    --bg: #f7f8fc;
    --bg-white: #fff;
    --border: #e8ecf1;
    --shadow: 0 2px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

/* 暗色模式变量 */
body.dark {
    --primary: #4d8ff7;
    --primary-dark: #306fd4;
    --primary-light: rgba(77,143,247,0.15);
    --primary-gradient: linear-gradient(135deg, #4d8ff7 0%, #306fd4 100%);
    --dark: #e8e8f0;
    --dark-secondary: #c0c0d0;
    --text: #d0d0dd;
    --text-secondary: #999aaa;
    --text-light: #777788;
    --bg: #151520;
    --bg-white: #1a1a2e;
    --border: #2a2a3e;
    --shadow: 0 2px 20px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
}

body.dark .header {
    background: rgba(26,26,46,0.95);
}

body.dark .hero {
    background: linear-gradient(160deg, #080c18 0%, #0d1424 50%, #080c18 100%);
    overflow: hidden;
    position: relative;
}
.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(26,109,245,0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(0,201,167,0.04) 0%, transparent 60%);
    animation: heroAmbient 8s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 0;
}
@keyframes heroAmbient {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-2%, 2%) scale(1.05); }
}
.hero .container,
.hero-particles {
    position: relative;
    z-index: 1;
}

body.dark .about,
body.dark .contact {
    background: var(--bg);
}

body.dark .about-card,
body.dark .business-card,
body.dark .news-card,
body.dark .contact-form {
    background: #1e1e35;
    border-color: var(--border);
}

body.dark .menu-toggle span {
    background: var(--dark);
}

body.dark .page-banner {
    background: linear-gradient(135deg, #1a1a30, #151528, #12121f);
}

/* 语言切换（希沃式下拉） */
.lang-switcher {
    position: absolute;
    right: 32px;
    z-index: 10;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 40px;
    padding: 0 14px;
    background: none;
    border: 1.5px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.lang-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

.lang-text {
    line-height: 1;
}

.lang-arrow {
    font-size: 0.6rem;
    line-height: 1;
}

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 130px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.2s ease;
}

.lang-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.lang-option:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.lang-option.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

body.dark .lang-toggle {
    border-color: var(--border);
    color: var(--text-light);
}

body.dark .lang-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
}

body.dark .lang-menu {
    background: var(--bg-white);
}

body {
    padding-top: 80px;  /* Fixed header height */

    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--text);
    background: var(--bg-white);
    line-height: 1.7;
    font-weight: 500;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* 英文模式字体微调 */
body.lang-en {
    letter-spacing: 0;
}

body.lang-en .hero h1 {
    font-size: 3rem;
}

body.lang-en .section-title,
body.lang-en .section-heading {
    font-size: 2.4rem;
}

body.lang-en .hero-desc,
body.lang-en .hero-subtitle {
    font-size: 1.15rem;
}

body.lang-en .section-subtitle,
body.lang-en .section-desc {
    font-size: 1.05rem;
}

body.lang-en .business-card-body h3,
body.lang-en .card h3 {
    font-size: 1.15rem;
}

body.lang-en .business-card-body p,
body.lang-en .card p {
    font-size: 0.92rem;
}

body.lang-en .news-card-body h3 {
    font-size: 1.05rem;
}

body.lang-en .news-card-body p {
    font-size: 0.94rem;
}

body.lang-en .tech-text h3 {
    font-size: 1.6rem;
}

body.lang-en .tl-card h4 {
    font-size: 1.05rem;
}

body.lang-en .tl-card p {
    font-size: 0.94rem;
}

body.lang-en .contact-info h3 {
    font-size: 1.6rem;
}

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

ul, ol { list-style: none; }

img { max-width: 100%; display: block; }

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

/* ---------- Header / Navigation ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: 0 1px 10px rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    padding: 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    position: absolute;
    left: 0;
    top: 0;
}

.logo-img {
    height: 72px;
    width: auto;
    display: block;
    margin-top: -2px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-list a {
    font-size: 1.05rem;
    color: var(--dark);
    font-weight: 500;
    position: relative;
    padding: 6px 14px;
}

/* 导航菜单项：去掉 hover 蓝条下划线 */
.nav-list a::after {
    display: none;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary);
}


/* ====== 下拉菜单 ====== */
.nav-dropdown {
    position: relative;
}
.nav-dropdown > a {
    display: flex;
    align-items: center;
    gap: 4px;
}
.dropdown-arrow {
    font-size: 0.7rem;
    margin-left: 3px;
    display: inline-block;
    vertical-align: middle;
    line-height: 1;
}
.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 8px;
    padding: 4px;
    background: #f5f6f8;
    border: 1px solid #e8ecf1;
    border-radius: 8px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    min-width: 220px;
    width: max-content;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
    list-style: none;
    z-index: 1001;
}
.nav-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: 16px;
}
.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    pointer-events: auto;
}
.dropdown-menu li {
    list-style: none;
}
.dropdown-menu a {
    display: block;
    padding: 14px 24px;
    border-radius: 6px;
    font-size: 0.94rem;
    color: #444;
    white-space: nowrap;
    transition: all 0.12s ease;
}
.dropdown-menu a::after {
    display: none;
}
.dropdown-menu a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* ---------- Mega Menu（希沃式 多栏分类面板） ---------- */
.dropdown-mega {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    margin-top: 10px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 24px 64px rgba(15,35,80,0.16);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
    z-index: 1001;
    padding: 30px 36px 28px;
    width: 720px;
    max-width: calc(100vw - 32px);
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px 28px;
}
.dropdown-mega::before {
    content: '';
    position: absolute;
    top: -16px; left: 0; width: 100%; height: 16px; /* hover 桥，防鼠标移过空隙关闭 */
}
.nav-dropdown:hover .dropdown-mega {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.dropdown-mega .mega-col {
    border-left: none;
    padding-left: 0;
}
/* 分组标题：品牌蓝竖条 + 加粗深色 */
.dropdown-mega .mega-col h5 {
    font-size: 0.85rem; font-weight: 700; color: var(--dark); letter-spacing: 0.04em;
    margin-bottom: 12px; position: relative; padding-left: 11px;
}
.dropdown-mega .mega-col h5::before {
    content: '';
    position: absolute;
    left: 0; top: 3px;
    width: 3px; height: 13px;
    background: var(--primary);
    border-radius: 2px;
}
.dropdown-mega .mega-col li { margin-bottom: 10px; }
.dropdown-mega .mega-col li:last-child { margin-bottom: 0; }
.dropdown-mega .mega-col li a {
    display: block; position: relative;
    padding: 9px 14px; border-radius: 10px;
    background: #f7f9fc; transition: background 0.15s ease, color 0.15s ease;
    font-size: 0.92rem; font-weight: 500; color: var(--dark); text-decoration: none;
    white-space: nowrap;
}
/* hover 右侧滑出 › 箭头 */
.dropdown-mega .mega-col li a::after {
    content: '›';
    position: absolute;
    right: 8px; top: 50%;
    font-size: 1.1rem; font-weight: 600; line-height: 1;
    color: var(--primary);
    opacity: 0; transform: translateY(-50%) translateX(-5px);
    transition: opacity 0.15s ease, transform 0.15s ease;
}
.dropdown-mega .mega-col li a:hover {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}
.dropdown-mega .mega-col li a:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}
.dropdown-mega .mega-col li a small {
    display: block; font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; line-height: 1.4;
}
.dropdown-mega .mega-col li a:hover small { color: var(--primary); opacity: 0.75; }

/* 单列 mega（服务支持 / 关于我们 等条目少的导航） */
.dropdown-mega.one-col {
    width: 320px;
    grid-template-columns: 1fr;
    padding: 24px 24px 18px;
    gap: 18px;
}
@media (max-width: 640px) {
    .dropdown-mega.one-col { width: auto; position: static; opacity: 1; pointer-events: auto; left: 0; transform: none; }
    .nav-dropdown:hover .dropdown-mega.one-col { transform: none; }
}

@media (max-width: 1100px) {
    .dropdown-mega { grid-template-columns: repeat(2, 1fr); width: 640px; gap: 24px 20px; }
}
@media (max-width: 640px) {
    .dropdown-mega {
        width: auto; left: 0; transform: translateX(0);
        grid-template-columns: 1fr;
        position: static;
        opacity: 1; pointer-events: auto;
        margin-top: 12px;
        padding: 16px;
    }
    .dropdown-mega .mega-col { border-left: none; padding-left: 0; border-top: 1px solid var(--border); padding-top: 14px; }
    .dropdown-mega .mega-col:first-child { border-top: none; padding-top: 0; }
    .nav-dropdown:hover .dropdown-mega { transform: translateX(0) translateY(0); }
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}

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

/* ---------- Hero / Banner ---------- */
/* ====== Hero ====== */
.hero {
    padding: 180px 0 140px;
    background: linear-gradient(160deg, #0a1628 0%, #0f1d3a 30%, #132347 60%, #0a1628 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(26,109,245,0.12) 0%, transparent 60%);
    border-radius: 50%;
    animation: heroGlow1 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    right: -15%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0,201,167,0.10) 0%, transparent 60%);
    border-radius: 50%;
    animation: heroGlow2 10s ease-in-out infinite;
}

@keyframes heroGlow1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -30px) scale(1.08); }
}
@keyframes heroGlow2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 40px) scale(1.06); }
}

/* 粒子 */
.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}
.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(26,109,245,0.5);
    border-radius: 50%;
    animation: floatParticle 6s ease-in-out infinite;
}
@keyframes floatParticle {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
    50% { transform: translateY(-30px) scale(2); opacity: 0.8; }
}

.hero-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 80px;
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(26,109,245,0.15);
    color: #5b9cf5;
    border: 1px solid rgba(26,109,245,0.25);
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    margin-bottom: 28px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 3.4rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.22;
    margin-bottom: 24px;
    }

.hero-gradient-text {
    background: linear-gradient(135deg, #5b9cf5 0%, #00c9a7 50%, #5b9cf5 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease infinite;
}
@keyframes gradientShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.hero-desc {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
    line-height: 1.9;
    margin-bottom: 40px;
    max-width: 520px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 36px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #1a6df5, #4a8cf7);
    color: #fff;
    box-shadow: 0 4px 24px rgba(26,109,245,0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(26,109,245,0.55);
}

.btn-outline {
    background: rgba(255,255,255,0.06);
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.25);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.78);
    transform: translateY(-3px);
}

/* 右侧视觉区 */
.hero-visual {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    position: relative;
    min-height: 420px;
}

/* 科技感环形 */
.hero-tech-ring {
    position: relative;
    width: 280px;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-tech-ring .ring {
    position: absolute;
    border-radius: 50%;
    border: 1.5px solid rgba(91,156,245,0.2);
    animation: ringPulse 4s ease-in-out infinite;
}
.ring.r1 { width: 100%; height: 100%; animation-delay: 0s; }
.ring.r2 { width: 72%; height: 72%; animation-delay: 0.6s; border-color: rgba(0,201,167,0.2); }
.ring.r3 { width: 44%; height: 44%; animation-delay: 1.2s; border-color: rgba(167,139,250,0.2); }
@keyframes ringPulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.06); opacity: 1; }
}
.ring-center {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.ring-icon {
    font-size: 2.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, #5b9cf5, #00c9a7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}
.ring-label {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.72);
    letter-spacing: 0.15em;
}

/* 环绕轨道粒子 */
.ring-orb {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    box-shadow: 0 0 12px currentColor;
    animation: orbitSpin 8s linear infinite;
}
.ring-orb.o1 { top: -4px; left: 50%; margin-left: -4px; color: #5b9cf5; }
.ring-orb.o2 { bottom: -4px; left: 50%; margin-left: -4px; color: #00c9a7; animation-delay: -4s; }
.ring-orb.o3 { left: -4px; top: 50%; margin-top: -4px; color: #a78bfa; animation-delay: -2s; }
.ring-orb.o4 { right: -4px; top: 50%; margin-top: -4px; color: #f59e0b; animation-delay: -6s; }
@keyframes orbitSpin {
    from { transform: rotate(0deg) translateX(140px) rotate(0deg); }
    to { transform: rotate(360deg) translateX(140px) rotate(-360deg); }
}

/* 产品亮点条 */
.hero-feature-strip {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    animation: stripFloat 6s ease-in-out infinite;
}
@keyframes stripFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}
.hfs-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 30px;
    font-size: 0.94rem;
    color: rgba(255,255,255,0.7);
    transition: all 0.3s;
    animation: fadeSlideUp 0.6s ease-out both;
}
.hfs-item:nth-child(1) { animation-delay: 0.1s; }
.hfs-item:nth-child(2) { animation-delay: 0.25s; }
.hfs-item:nth-child(3) { animation-delay: 0.4s; }
.hfs-item:nth-child(4) { animation-delay: 0.55s; }
.hfs-item:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.18);
    color: #fff;
    transform: translateY(-2px);
}
@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.hfs-item:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}
.hfs-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* 统计数字 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 48px;
}

.hero-stat {
    text-align: center;
    padding: 18px 12px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 14px;
    transition: all 0.3s;
}
.hero-stat:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.hero-stat .num {
    font-size: 1.7rem;
    font-weight: 800;
    color: #5b9cf5;
    display: block;
    letter-spacing: -0.02em;
}

.hero-stat .label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.78);
    margin-top: 4px;
}

/* ---------- Section Common ---------- */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}


.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- About / Brand ---------- */
.about { background: linear-gradient(180deg, #fff 0%, #f7f8fc 100%); }
.about-intro {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.about-intro-text {
    margin-bottom: 40px;
}
.about-lead {
    font-size: 1.2rem !important;
    color: var(--dark) !important;
    font-weight: 400 !important;
    line-height: 2 !important;
}
.about-lead strong {
    color: var(--primary);
    font-weight: 700;
}
.about-intro-text p {
    font-size: 0.98rem;
    color: var(--text-secondary);
    line-height: 2;
    margin-bottom: 16px;
}
.about-intro-text p strong {
    color: var(--dark);
    font-weight: 600;
}
.about-intro-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.04);
}
.ais-item {
    text-align: center;
    padding: 0 48px;
}
.ais-num {
    font-size: 2.6rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1a6df5, #00c9a7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    line-height: 1.2;
}
.ais-label {
    font-size: 0.94rem;
    color: var(--text-light);
    margin-top: 6px;
    display: block;
}
.ais-divider {
    width: 1px;
    height: 50px;
    background: var(--border);
}



/* ---------- Business / Products ---------- */
.business-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}
.biz-card {
    --accent: #1a6df5;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 36px 32px;
    display: flex;
    flex-direction: column;
}



.biz-card-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
    color: var(--primary);
}
.biz-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.biz-card p {
    font-size: 0.94rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.biz-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.92rem;
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
    transition: gap 0.2s ease;
    margin-top: auto;
}
.biz-link:hover { gap: 10px; }
.biz-card-sub {
    background: var(--bg);
    border-style: dashed;
}

@media (max-width: 640px) {
    .business-grid { grid-template-columns: 1fr; }
}

/* ---------- Tech / Strength ---------- */
.tech {
    background: var(--dark);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.tech::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(26,109,245,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.tech 
.tech .section-title {
    color: #fff;
}

.tech .section-subtitle {
    color: rgba(255,255,255,0.82);
}

/* #tech 白底场景(首页公司实力): 覆盖 .tech 的深色背景假设 */
#tech #tech .section-title { color: var(--dark); }
#tech .section-subtitle { color: var(--text-secondary); }

.tech-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.tech-stat {
    text-align: center;
    padding: 28px 20px 24px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(15,35,80,0.06);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}
.tech-stat:hover {
    background: #fff;
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(26,109,245,0.14);
}
#tech .section-header { margin-bottom: 36px; }



.tech-stat .num {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 8px;
}

.tech-stat .label {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.tech-content {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.tech-text {
    flex: 1;
}

.tech-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}


/* 公司实力特性卡（tf） */
.tf-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-top: 36px;
    text-align: left;
}
.tf-card {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 16px;
    align-items: start;
    padding: 22px 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 2px 10px rgba(15,35,80,0.04);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.tf-card .tf-icon {
    grid-row: 1; grid-column: 1;
}
.tf-card h4 {
    grid-row: 1; grid-column: 2;
    min-width: 0;
}
.tf-card p {
    grid-row: 2; grid-column: 2;
    min-width: 0;
}
.tf-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 34px rgba(26,109,245,0.12);
    border-color: rgba(26,109,245,0.25);
}
.tf-icon {
    flex-shrink: 0;
    width: 44px; height: 44px;
    border-radius: 12px;
    display: grid; place-items: center;
    background: rgba(26,109,245,0.08);
    color: var(--primary);
}
.tf-icon svg { width: 22px; height: 22px; }
.tf-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
    line-height: 1.5;
}
.tf-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0;
}
#tech .tech-text p strong {
    color: var(--dark);
    font-weight: 700;
}
@media (max-width: 700px) {
    .tf-grid { grid-template-columns: 1fr; }
}
.tech-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.tech-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 28px;
}

.tech-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-sm);
}

.tech-feature .check {
    width: 24px;
    height: 24px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
}

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

.tech-feature p {
    font-size: 0.94rem;
    color: rgba(255,255,255,0.78);
    margin: 0;
}

.tech-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.tech-circle {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
    box-shadow: 0 0 80px rgba(26,109,245,0.3);
}

.tech-circle span {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.6;
}

/* ---------- News ---------- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-card-img {
    height: 180px;
    background: linear-gradient(135deg, #e8f1fe 0%, #f0f5ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-light);
}

.news-card-body {
    padding: 24px;
}

.news-card-body .date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.news-card-body h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-body p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- Contact ---------- */
.contact {
    background: var(--bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.contact-item .ci-icon {
    width: 44px;
    height: 44px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.contact-form {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.94rem;
    color: var(--text);
    background: var(--bg);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(26,109,245,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--dark);
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-brand h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-brand p {
    color: rgba(255,255,255,0.78);
    font-size: 0.94rem;
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul a {
    color: rgba(255,255,255,0.78);
    font-size: 0.94rem;
    transition: var(--transition);
}

.footer-col ul a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.94rem;
    color: rgba(255,255,255,0.72);
}

.footer-bottom a {
    color: rgba(255,255,255,0.72);
}

.footer-bottom a:hover {
    color: rgba(255,255,255,0.7);
}

/* ---------- Animations ---------- */
/* 默认：内容直接可见（无 JS / JS 未接管时保证不消失、不糊） */
.fade-up {
    opacity: 1;
    transform: translateY(0);
}

/* 仅当 JS 接管（html.js）时，才进入"先藏后放"的入场动画 */
html.js .fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
html.js .fade-up.visible {
    opacity: 1;
    transform: none;
    will-change: auto;
}

/* ---------- Page Banner (sub-pages) ---------- */
.page-banner {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f0f5ff 0%, #e8f1fe 50%, #f7f8fc 100%);
    text-align: center;
}

.page-banner h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}

.page-banner .breadcrumb {
    font-size: 0.94rem;
    color: var(--text-light);
}

.page-banner .breadcrumb a {
    color: var(--primary);
}

.page-banner .breadcrumb span {
    margin: 0 8px;
}

/* ---------- Timeline ---------- */
.timeline-section {
    background: var(--bg);
}

.timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    border-radius: 1px;
}

.tl-item {
    position: relative;
    margin-bottom: 36px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.tl-item:last-child {
    margin-bottom: 0;
}

.tl-dot {
    position: absolute;
    left: -35px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid var(--bg);
    box-shadow: 0 0 0 2px var(--primary);
}

.tl-year {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
    min-width: 90px;
    padding-top: 2px;
}

.tl-card {
    background: var(--bg-white);
    padding: 18px 22px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    flex: 1;
}

.tl-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.tl-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

body.dark .tl-dot {
    border-color: var(--bg);
}

body.dark .tl-card {
    background: #1e1e35;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .timeline {
        padding-left: 32px;
    }
    .tl-item {
        gap: 16px;
    }

    .hero-inner {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-card {
        width: 100%;
        max-width: 420px;
        height: auto;
    }

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

    .tech-content {
        flex-direction: column;
    }

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

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

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

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    box-shadow: 0 4px 16px rgba(26,109,245,0.35);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(26,109,245,0.5);
}



/* ========== Mobile (max-width: 768px) ========== */
@media (max-width: 768px) {
    html { font-size: 15px; }
    .container { padding: 0 14px; }

    /* ====== Header ====== */
    .header-inner { height: 56px; padding: 0 10px; display: flex; align-items: center; }
    .logo { position: static; margin: 0; z-index: 1001; }
    .logo-img { height: 46px; }
    .lang-switcher { order: 2; margin-left: auto; margin-right: 6px; position: static; z-index: 1001; }
    .lang-toggle { width: auto; height: 34px; padding: 0 10px; font-size: 0.72rem; position: static; }
    .menu-toggle { display: flex; order: 3; }

    /* Mobile nav - slides down from top */
    .nav-list {
        position: fixed;
        top: 56px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 8px 0;
        gap: 0;
        box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
        z-index: 999;
        max-height: calc(100vh - 56px);
        overflow-y: auto;
    }
    .nav-list.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-list > li > a { 
        padding: 12px 18px; 
        display: flex; 
        align-items: center;
        justify-content: space-between;
        font-size: 0.94rem; 
        border-bottom: 1px solid #f0f0f0;
        color: #333;
    }
    .nav-list a::after { display: none; }
    .nav-list a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }

    /* Dropdowns in mobile nav */
    .nav-dropdown .dropdown-menu {
        display: none;
        background: #f8f9fa;
        padding: 0;
        margin: 0;
        border: none;
        border-radius: 0;
        box-shadow: none;
        position: static;
        transform: none;
        opacity: 1;
        pointer-events: auto;
    }
    .nav-dropdown.drop-open .dropdown-menu { display: block; }
    .dropdown-menu a { 
        padding: 10px 18px 10px 32px; 
        font-size: 0.94rem; 
        border-bottom: 1px solid #eee;
        color: #666;
    }
    .dropdown-arrow { display: inline-block; font-size: 0.6rem; color: #999; transition: transform 0.2s; }
    .nav-dropdown.drop-open .dropdown-arrow { transform: rotate(180deg); }

    /* ====== Hero ====== */
    .hero { padding: 60px 0 32px; }
    .hero-inner { flex-direction: column; text-align: center; gap: 16px; }
    .hero-text { max-width: 100%; }
    .hero h1 { font-size: 1.5rem; line-height: 1.3; margin-bottom: 8px; }
    .hero-desc { font-size: 0.875rem; margin-bottom: 16px; }
    .hero-btns { flex-direction: column; align-items: stretch; gap: 8px; }
    .hero-btns .btn { width: 100%; justify-content: center; padding: 12px 16px; font-size: 0.92rem; }
    .hero-visual { min-height: auto; }
    .hero-tech-ring { width: 180px; height: 180px; margin: 0 auto; }
    .hero-feature-strip { flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 8px; }
    .hfs-item { padding: 5px 10px; font-size: 0.72rem; }
    .hero-particles { display: none; }

    /* ====== Sections ====== */
    .section { padding: 32px 0; }
    .section-header { margin-bottom: 20px; }
    .section-title { font-size: 1.3rem; }
    .section-subtitle { font-size: 0.875rem; }
    .page-banner { padding: 18px 0; }
    .page-banner h1 { font-size: 1.3rem; }

    /* ====== About ====== */
    .about-intro { padding: 0; }
    .about-intro-text { margin-bottom: 20px; }
    .about-lead { font-size: 1rem !important; }
    .about-intro-stats { flex-direction: column; gap: 12px; padding: 18px 0; }
    .ais-divider { width: 40px; height: 1px; }
    .ais-num { font-size: 1.6rem; }
    .ais-item { padding: 0 20px; }

    /* ====== Business ====== */
    .business-grid { grid-template-columns: 1fr; gap: 8px; }
    .biz-card { padding: 16px 14px; }
    .biz-card h4 { font-size: 0.94rem; }
    .biz-card p { font-size: 0.8rem; }

    /* ====== Tech ====== */
    .tech-stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .tech-stat { padding: 12px 8px; }
    .tech-stat .num { font-size: 1.3rem; }
    .tech-content { flex-direction: column; gap: 20px; }
    .tech-text { max-width: 100%; }
    .tech-features { grid-template-columns: 1fr; }
    .tech-visual { display: none; }

    /* ====== Timeline ====== */
    .timeline { padding-left: 18px; }

    /* ====== News ====== */
    .news-grid { grid-template-columns: 1fr; }
    .news-item-header { flex-wrap: wrap; gap: 8px; padding: 16px 12px; }
    .news-item-date { width: auto; display: flex; gap: 6px; }
    .news-item-date .day { font-size: 1.2rem; }
    .news-item-body h3 { font-size: 0.92rem; }
    .news-item-body p { font-size: 0.8rem; }
    .news-detail-inner { margin-left: 0; padding: 12px; }
    .news-item-arrow { width: 16px; height: 16px; margin-left: auto; }

    /* ====== Contact ====== */
    .contact-grid { grid-template-columns: 1fr; gap: 24px; }
    .form-row { grid-template-columns: 1fr; gap: 12px; }

    /* ====== Footer ====== */
    .footer-grid { grid-template-columns: 1fr; gap: 16px; }
    .footer-bottom { flex-direction: column; gap: 6px; text-align: center; font-size: 0.78rem; }
    .footer { padding: 32px 0 20px; }

    /* ====== Other ====== */
    .about-hero-block h2 { font-size: 1.6rem; }
    .about-hero-stats { gap: 16px; }
    .ahs-num { font-size: 2rem; }
    .ahr-address { flex-direction: column; align-items: center; gap: 8px; }
    .about-page-grid { grid-template-columns: 1fr; gap: 20px; }
    .values-grid { grid-template-columns: repeat(2, 1fr); }
    .value-card { padding: 20px 14px; }
    .partners-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .partner-logo-card { min-height: 100px; padding: 16px 10px; }
    .partner-logo-card img { height: 36px; }
    .partner-logo-card .plc-name { font-size: 0.72rem; }
    .photo-showcase { grid-template-columns: 1fr; }
    .about-photo-gallery { grid-template-columns: 1fr; }
    .timeline-photo { height: 180px; }

    /* Back to top */
    .back-to-top { bottom: 14px; right: 14px; width: 38px; height: 38px; }

    /* 移动端环形粒子轨道修正（ring 缩小到 180px，轨道半径同步缩小） */
    .hero-tech-ring .ring-orb {
        animation-name: orbitSpinMobile;
    }
}

@keyframes orbitSpinMobile {
    from { transform: rotate(0deg) translateX(90px) rotate(0deg); }
    to { transform: rotate(360deg) translateX(90px) rotate(-360deg); }
}

/* ---------- 尊重系统减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ====== 核心亮点 + 实施流程 (希沃式图文交替) ====== */
.hl-block { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; padding: 44px 0; }
.hl-block + .hl-block { border-top: 1px solid var(--border); }
.hl-block.flip .hl-panel { order: -1; }
.hl-text h3 { font-size: 1.45rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; line-height: 1.4; }
.hl-text h3 .hl-mark { color: var(--primary); font-weight: 800; }
.hl-text > p { color: var(--text-secondary); line-height: 1.9; font-size: 0.95rem; }
.hl-points { list-style: none; margin-top: 18px; }
.hl-points li { position: relative; padding-left: 18px; margin-bottom: 10px; font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }
.hl-points li::before { content: ''; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; border-radius: 2px; background: var(--primary); }
.hl-panel { min-height: 240px; display: flex; align-items: center; justify-content: center; }
.hl-panel.img { background: #f7f9fc; border-radius: 16px; overflow: hidden; }
.hl-panel.img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hl-statgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: 100%; background: #f7f9fc; border-radius: 16px; padding: 24px 18px; }
.hl-stat { text-align: center; }
.hl-stat span { display: block; font-size: 1.7rem; font-weight: 800; background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 6px; }
.hl-stat small { font-size: 0.8rem; color: var(--text-secondary); }
.hl-iconpanel { width: 100%; min-height: 240px; background: #f7f9fc; border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; }
.hl-iconpanel .hl-ico { width: 84px; height: 84px; border-radius: 22px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.hl-iconpanel .hl-ico svg { width: 40px; height: 40px; }
.hl-iconpanel p { font-size: 0.92rem; color: var(--text-secondary); max-width: 260px; line-height: 1.8; text-align: center; }
/* 实施流程 */
.flow-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.flow-step { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 24px 20px; position: relative; transition: var(--transition); }
.flow-step:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(26,109,245,0.10); border-color: rgba(26,109,245,0.25); }
.flow-step .step-num { width: 34px; height: 34px; border-radius: 50%; background: var(--primary-light); color: var(--primary); font-weight: 700; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; font-size: 0.95rem; }
.flow-step h4 { font-size: 0.98rem; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.flow-step p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; }
@media (max-width: 900px) {
    .hl-block { grid-template-columns: 1fr; gap: 24px; padding: 32px 0; }
    .hl-block.flip .hl-panel { order: 0; }
    .flow-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .flow-steps { grid-template-columns: 1fr; }
    .hl-statgrid { grid-template-columns: 1fr; gap: 8px; }
}

/* ═══ 手册风格·方案亮点 (mss) ═══ */
.mss { padding: 64px 0; }
.mss-alt { background: var(--bg-alt); }
.mss-title { font-size: 1.5rem; font-weight: 700; color: var(--dark); margin: 0 0 16px; display: flex; align-items: center; gap: 12px; }
.mss-title::before { content: ''; width: 4px; height: 24px; background: #1a6df5; border-radius: 2px; }
.mss-intro { color: var(--text-secondary); line-height: 1.9; font-size: 0.95rem; max-width: 860px; margin: 0 0 36px; }
.mss-items { display: flex; flex-direction: column; gap: 48px; max-width: 1080px; margin: 0 auto; }
.mss-item { display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: center; }
.mss-item.flip .mss-text { order: 2; }
.mss-item.flip .mss-media { order: 1; }
.mss-item.solo { grid-template-columns: 1fr; max-width: 640px; }
.mss-item.solo.flip .mss-text { order: 0; }
.mss-num { font-size: 2.4rem; font-weight: 800; color: #1a6df5; line-height: 1; letter-spacing: 0.05em; }
.mss-tag { display: inline-block; margin-top: 12px; padding: 6px 14px; background: linear-gradient(90deg, #1a6df5, #4f8bff); color: #fff; border-radius: 8px; font-size: 0.85rem; font-weight: 600; }
.mss-text p { margin-top: 14px; color: var(--text-secondary); line-height: 1.85; font-size: 0.92rem; }
.mss-media { background: #fff; border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: 0 12px 32px rgba(15, 35, 80, 0.08); }
.mss-media img { width: 100%; display: block; }
.mss-media .mss-dark { border-radius: 8px; } .mss-media:has(> img.mss-dark) { background: #0e1526; border: 1px solid rgba(15,35,80,.25); padding: 10px; box-shadow: 0 12px 32px rgba(15,35,80,.15); } .mss-media.empty { background: linear-gradient(135deg, #1a6df5 0%, #0d4fc4 100%); display: flex; align-items: center; justify-content: center; min-height: 220px; }
.mss-media.empty .mss-empty-num { font-size: 3rem; font-weight: 800; color: rgba(255,255,255,0.35); letter-spacing: 0.06em; }
.mss-sub { margin-top: 56px; }
.mss-sub h3 { font-size: 1.15rem; font-weight: 700; color: var(--dark); margin: 0 0 10px; }
.mss-sub > p { color: var(--text-secondary); line-height: 1.85; font-size: 0.92rem; margin: 0 0 28px; max-width: 860px; }
.mss-models { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 40px; }
.mss-model { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.mss-model-code { font-size: 1.5rem; font-weight: 800; color: #1a6df5; }
.mss-model-role { font-weight: 600; color: var(--dark); margin: 4px 0 8px; font-size: 0.95rem; }
.mss-model p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }
@media (max-width: 768px) {
    .mss-item { grid-template-columns: 1fr; gap: 20px; }
    .mss-item.flip .mss-text, .mss-item.flip .mss-media { order: 0; }
    .mss-models { grid-template-columns: 1fr; }
}

/* compact hero-like big blocks (mimic iflytek layout) */
.mss-big { display: flex; flex-direction: column; gap: 48px; max-width: 920px; margin: 8px auto 0; }
.mss-big-block { text-align: center; }
.mss-big-block h3 { font-size: 1.25rem; font-weight: 700; color: var(--dark); margin: 0 0 12px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.mss-big-block h3::before { content: ''; width: 4px; height: 20px; background: #1a6df5; border-radius: 2px; flex: 0 0 auto; }
.mss-big-block p { color: var(--text-secondary); line-height: 1.85; font-size: 0.95rem; max-width: 780px; margin: 0 auto 24px; }
.mss-big-media { background: #fff; border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: 0 12px 32px rgba(15, 35, 80, 0.08); }
.mss-big-media img { width: 100%; display: block; }
.mss-big-media .mss-dark { border-radius: 8px; }
.mss-big-media:has(> img.mss-dark) { background: #0e1526; border: 1px solid rgba(15, 35, 80, 0.25); padding: 10px; box-shadow: 0 12px 32px rgba(15, 35, 80, 0.15); }

/* polished core-capability feature blocks */
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.sec-head h2 { font-size: 1.9rem; font-weight: 800; color: var(--dark); margin: 0 0 12px; }
.sec-head p { color: var(--text-secondary); font-size: .95rem; line-height: 1.8; margin: 0; }
.mss-feats { display: flex; flex-direction: column; gap: 60px; max-width: 1040px; margin: 0 auto; }
.mss-feat { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 52px; align-items: center; }
.mss-feat.flip .mss-feat-text { order: 2; }
.mss-feat.flip .mss-feat-media { order: 1; }
.mss-feat-num { font-size: 2.5rem; font-weight: 800; line-height: 1; letter-spacing: .02em; background: linear-gradient(120deg, #1a6df5, #7aa5ff); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 12px; }
.mss-feat-text h3 { font-size: 1.4rem; font-weight: 700; color: var(--dark); margin: 0 0 12px; display: flex; align-items: center; gap: 10px; }
.mss-feat-text h3::before { content: ''; width: 4px; height: 20px; border-radius: 2px; background: linear-gradient(180deg, #1a6df5, #7aa5ff); flex: 0 0 auto; }
.mss-feat-desc { color: var(--text-secondary); line-height: 1.9; font-size: .95rem; margin: 0 0 18px; max-width: 470px; }
.mss-feat-media { background: #fff; border: 1px solid #e3ebf6; border-radius: 18px; overflow: hidden; box-shadow: 0 16px 40px rgba(15, 35, 80, .09); transition: transform .3s ease, box-shadow .3s ease; }
.mss-feat-media:hover { transform: translateY(-6px); box-shadow: 0 24px 56px rgba(15, 35, 80, .14); }
.mss-feat-media img { width: 100%; display: block; }
@media (max-width: 900px) {
    .mss-feat { grid-template-columns: 1fr; gap: 24px; }
    .mss-feat.flip .mss-feat-text, .mss-feat.flip .mss-feat-media { order: 0; }
    .mss-feats { gap: 44px; }
}

.mss-feat-media { padding: 10px; background: linear-gradient(180deg,#fff,#f7faff); }
.mss-feat-media img { border-radius: 10px; border: 1px solid #edf2fa; }

/* icon media card for restyled service pages */
.noimg-core { min-height: 300px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; background: linear-gradient(160deg, #f5f9ff 0%, #eef4ff 100%); }
.noimg-core .glyph { width: 84px; height: 84px; border-radius: 24px; display: grid; place-items: center; font-size: 2.1rem; font-weight: 800; color: #1a6df5; background: #fff; box-shadow: 0 10px 30px rgba(26,109,245,.18); }
.noimg-core p { font-size: 1rem; font-weight: 700; color: #2b4a7e; margin: 0; }