/* ============================================
   铂码信息科技官网  -  简约大方风格
   ============================================ */

:root {
    --color-primary: #1a3a6c;
    --color-primary-light: #2c5394;
    --color-accent: #2563eb;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-soft: #f8fafc;
    --color-bg-section: #f1f5f9;
    --color-border: #e5e7eb;
    --color-border-soft: #f1f5f9;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.08);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --container: 1200px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --font-sans: "Inter", "Noto Sans SC", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 32px;
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.5px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.logo-mark-img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 10px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text strong {
    font-size: 17px;
    color: var(--color-text);
    font-weight: 700;
}

.logo-text em {
    font-style: normal;
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 0.4px;
    margin-top: 3px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 4px 0;
}

.nav a::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
    transition: width var(--transition);
}

.nav a:hover {
    color: var(--color-accent);
}

.nav a:hover::after {
    width: 24px;
}

/* 头部右侧操作区 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ---- 语言切换器 ---- */
.lang-switcher {
    position: relative;
    z-index: 101;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    background: transparent;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition);
    font-family: var(--font-sans);
    line-height: 1;
}

.lang-current:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(37, 99, 235, 0.04);
}

.lang-current.open {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(37, 99, 235, 0.06);
}

.lang-globe {
    opacity: 0.7;
    flex-shrink: 0;
}

.lang-chevron {
    opacity: 0.5;
    transition: transform var(--transition);
    flex-shrink: 0;
}

.lang-current.open .lang-chevron {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 130px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 6px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.25s ease;
    pointer-events: none;
}

.lang-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.lang-dropdown button {
    display: block;
    width: 100%;
    padding: 10px 14px;
    border: none;
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    font-size: 14px;
    font-family: var(--font-sans);
    text-align: left;
    color: var(--color-text);
    transition: all 0.15s ease;
}

.lang-dropdown button:hover {
    background: var(--color-bg-soft);
    color: var(--color-accent);
}

.lang-dropdown button.active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-accent);
    font-weight: 600;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: var(--transition);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #0a1e3f 0%, #1a3a6c 50%, #2c5394 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-glow {
    position: absolute;
    top: 10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.35) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
}

.hero::before {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--color-bg));
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 880px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(40px, 5.6vw, 72px);
    color: #fff;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 28px;
}

.hero-title .accent {
    background: linear-gradient(135deg, #60a5fa 0%, #93c5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 19px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 48px;
    max-width: 640px;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.btn-ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

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

.hero-stats {
    display: flex;
    gap: 60px;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    max-width: 640px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 38px;
    font-weight: 700;
    color: #fff;
    line-height: 1;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
    margin-top: 8px;
}

/* ============================================
   通用 Section
   ============================================ */
.section {
    padding: 120px 0;
}

.section-head {
    max-width: 720px;
    margin: 0 auto 72px;
    text-align: center;
}

.eyebrow {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.eyebrow:empty {
    display: none;
    margin-bottom: 0;
}

.section-title {
    font-size: clamp(32px, 4vw, 46px);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-sub {
    font-size: 17px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================
   About
   ============================================ */
.about {
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-text .lead {
    font-size: 19px;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 24px;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 18px;
    font-size: 16px;
}

.about-text strong {
    color: var(--color-primary);
    font-weight: 600;
}

.about-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 36px;
    padding-top: 36px;
    border-top: 1px solid var(--color-border);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.meta-label {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: 500;
}

.meta-value {
    font-size: 16px;
    color: var(--color-text);
    font-weight: 600;
}

.about-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 16px;
}


.about-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #60a5fa);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

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

.card-num {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.about-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.about-card p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.about-card.card-1 {
    grid-column: 1;
    grid-row: 1;
}

.about-card.card-3 {
    grid-column: 2;
    grid-row: 1 / span 2;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    border-color: transparent;
}

.about-card.card-3::before {
    background: rgba(255, 255, 255, 0.4);
}

.about-card.card-3 .card-num {
    color: #93c5fd;
}

.about-card.card-3 h4,
.about-card.card-3 p {
    color: #fff;
}

.about-card.card-3 p {
    color: rgba(255, 255, 255, 0.85);
}

/* ============================================
   Services
   ============================================ */
.services {
    background: var(--color-bg-soft);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition);
    position: relative;
}

.service-card.featured {
    background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 20px 40px rgba(26, 58, 108, 0.18);
    transform: translateY(-12px);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-card.featured:hover {
    transform: translateY(-18px);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    transition: var(--transition);
}

.service-icon svg {
    width: 36px;
    height: 36px;
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.service-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

.service-card.featured p {
    color: rgba(255, 255, 255, 0.85);
}

.service-list {
    border-top: 1px solid var(--color-border-soft);
    padding-top: 20px;
}

.service-card.featured .service-list {
    border-top-color: rgba(255, 255, 255, 0.15);
}

.service-list li {
    font-size: 14px;
    color: var(--color-text-muted);
    padding: 8px 0;
    padding-left: 22px;
    position: relative;
}

.service-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    width: 12px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

.service-card.featured .service-list li {
    color: rgba(255, 255, 255, 0.85);
}

.service-card.featured .service-list li::before {
    background: #93c5fd;
}

/* ============================================
   Advantages
   ============================================ */
.advantages {
    background: var(--color-bg);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 80px;
}

/* 5-item layout: first row 3, second row 2 centered */
.advantage-grid {
    grid-template-columns: repeat(6, 1fr);
}

.advantage-grid .advantage-block:nth-child(-n+3) {
    grid-column: span 2;
}

.advantage-grid .advantage-block:nth-child(4) {
    grid-column: 2 / span 2;
}

.advantage-grid .advantage-block:nth-child(5) {
    grid-column: 4 / span 2;
}

.advantage-block {
    text-align: center;
    padding: 48px 32px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    position: relative;
}

.advantage-block:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    background: #fff;
}

.advantage-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #60a5fa 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-block h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}

.advantage-desc {
    font-size: 13px;
    color: var(--color-accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 24px;
}

.advantage-block ul {
    text-align: left;
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
}

.advantage-block ul li {
    font-size: 14px;
    color: var(--color-text-muted);
    padding: 8px 0;
    padding-left: 22px;
    position: relative;
}

.advantage-block ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.philosophy {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-lg);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.philosophy::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.philosophy-quote {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
    position: relative;
    z-index: 1;
}

.quote-mark {
    color: #93c5fd;
    font-size: 28px;
    margin: 0 8px;
    font-weight: 700;
}

.philosophy-author {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 2px;
    position: relative;
    z-index: 1;
}

/* ============================================
   Team
   ============================================ */
.team {
    background: var(--color-bg-section);
}

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

.team-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 48px 36px;
    text-align: center;
    transition: all var(--transition);
    border: 1px solid var(--color-border-soft);
    position: relative;
    overflow: hidden;
}

.team-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), #60a5fa);
}

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

.team-num {
    font-size: 64px;
    font-weight: 800;
    line-height: 1;
    color: var(--color-primary);
    margin-bottom: 8px;
    letter-spacing: -2px;
}

.team-unit {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.team-note {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

.team-target {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 20px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-sm);
}

.target-label {
    font-size: 12px;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.target-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-accent);
}

/* ============================================
   Clients
   ============================================ */
.clients {
    background: var(--color-bg-soft);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.client-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    transition: all var(--transition);
    min-height: 180px;
}

.client-item:hover {
    border-color: transparent;
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.client-item img {
    max-width: 160px;
    max-height: 72px;
    object-fit: contain;
    filter: grayscale(40%);
    opacity: 0.85;
    transition: all var(--transition);
}

.client-item:hover img {
    filter: grayscale(0);
    opacity: 1;
}

.client-item span {
    font-size: 14px;
    color: var(--color-text-muted);
    font-weight: 500;
    text-align: center;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: stretch;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-block {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.contact-block:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #60a5fa 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.2);
}

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

.contact-block h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.contact-block p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.contact-block p.muted {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 4px;
}

.contact-block a {
    color: var(--color-accent);
    font-weight: 500;
}

.contact-block a:hover {
    color: var(--color-primary);
}

.contact-map {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-soft);
    box-shadow: var(--shadow-md);
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.contact-map img,
.contact-map .map-svg {
    width: 100%;
    flex: 1;
    object-fit: cover;
    object-position: center;
}

.map-caption {
    background: #fff;
    padding: 20px 24px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.map-caption strong {
    font-size: 16px;
    color: var(--color-text);
}

.map-caption span {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: #0a1e3f;
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 280px;
    line-height: 1.6;
}

.logo-footer .logo-text strong {
    color: #fff;
}

.logo-footer .logo-text em {
    color: rgba(255, 255, 255, 0.6);
}

.footer-meta {
    display: contents;
}

.footer-meta h5 {
    font-size: 14px;
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.footer-meta ul li {
    font-size: 14px;
    padding: 6px 0;
    color: rgba(255, 255, 255, 0.65);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom span {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.beian-link {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.25s;
}

.beian-link:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   Back to top
   ============================================ */
.back-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 50;
}

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

.back-top:hover {
    transform: translateY(-4px);
}

.back-top svg {
    width: 22px;
    height: 22px;
}

/* ============================================
   动画
   ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeUp 0.8s ease-out both;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    .container {
        padding: 0 24px;
    }

    .nav {
        gap: 24px;
    }

    .nav a {
        font-size: 14px;
    }

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

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

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

    .advantage-grid .advantage-block:nth-child(-n+3),
    .advantage-grid .advantage-block:nth-child(4),
    .advantage-grid .advantage-block:nth-child(5) {
        grid-column: span 1;
    }

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

    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 0;
        padding: 16px 0;
        border-top: 1px solid var(--color-border);
        transform: translateY(-110%);
        transition: transform 0.4s ease;
        box-shadow: var(--shadow-md);
    }

    .nav.open {
        transform: translateY(0);
    }

    .nav a {
        padding: 14px 32px;
        width: 100%;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero {
        min-height: auto;
        padding: 110px 0 70px;
    }

    .hero-stats {
        gap: 36px;
        flex-wrap: wrap;
    }

    .stat-num {
        font-size: 30px;
    }

    .section {
        padding: 80px 0;
    }

    .services-grid,
    .advantage-grid,
    .clients-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .about-visual {
        grid-template-columns: 1fr;
    }


    .about-card.card-3 {
        grid-column: auto;
        grid-row: auto;
    }

    .service-card.featured {
        transform: translateY(0);
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom .container {
        flex-direction: column;
        text-align: center;
    }

    .philosophy {
        padding: 40px 24px;
    }

    .contact-map {
        min-height: 280px;
    }

    .back-top {
        right: 20px;
        bottom: 20px;
        width: 42px;
        height: 42px;
    }

    .lang-current {
        padding: 6px 10px;
        font-size: 12px;
    }

    .lang-current .lang-globe {
        width: 15px;
        height: 15px;
    }

    .header-actions {
        gap: 10px;
    }
}