/* ========================================
   威伏智控 WAVOLTENSOR
   Kongsberg × Apple 风格 · 浅色主题
   Brand: #0098CA (Cyan-Blue from logo)
   ======================================== */

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #1d1d1f;
    background: #ffffff;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

:root {
    --brand: #0098CA;
    --brand-dark: #0078A0;
    --brand-light: #e6f5fa;
    --navy: #0a1628;
    --text: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-light: #86868b;
    --bg-light: #f5f5f7;
    --bg-white: #ffffff;
    --border: #e5e5e5;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
}

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

/* ===== Utility classes ===== */
.section-light { background: var(--bg-white); }
.section-dark { background: var(--navy); }
.text-accent { color: var(--brand); }
.text-accent-light { color: #60d0ff; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 60px; }
.container-narrow { max-width: 1000px; margin: 0 auto; padding: 0 60px; }

.section { padding: 100px 0; }

/* 所有section标题统一居中 */
.section-header-center {
    text-align: center;
    margin-bottom: 64px;
}
.section-header-center .section-eyebrow,
.section-header-center .section-eyebrow-light {
    text-align: center;
}
.section-header-center .section-lead,
.section-header-center .section-lead-light {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
/* 深色背景下的section-header-center保持一致 */
.section-dark .section-header-center {
    text-align: center;
}
.section-dark .section-header-center .section-eyebrow-light {
    text-align: center;
}
.section-dark .section-header-center .section-heading-light {
    text-align: center;
}
.section-dark .section-header-center .section-lead-light {
    text-align: center;
}

.section-eyebrow {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--brand);
    margin-bottom: 16px;
}
.section-eyebrow-light {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: #60d0ff;
    margin-bottom: 16px;
}

.section-heading {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 20px;
}
.section-heading-light {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 20px;
}

.section-lead {
    font-size: 17px;
    line-height: 1.65;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}
.section-lead-light {
    font-size: 17px;
    line-height: 1.65;
    color: rgba(255,255,255,0.7);
    max-width: 640px;
    margin: 0 auto;
}

.hide-mobile { display: inline; }

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background 0.35s, box-shadow 0.35s;
    background: transparent;
}
.header.scrolled {
    background: rgba(255,255,255,0.82);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: opacity 0.2s;
}
.logo:hover { opacity: 0.75; }
.logo-img {
    width: auto;
    height: 34px;
    object-fit: contain;
}
.logo-text-group { display: flex; flex-direction: column; }
.logo-name {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text);
    line-height: 1.2;
}
.header:not(.scrolled) .logo-name { color: #fff; }
.logo-sub {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text);
    line-height: 1.2;
}
.header:not(.scrolled) .logo-sub { color: rgba(255,255,255,0.7); }

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    margin-left: auto;
}
.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
    position: relative;
}
.header:not(.scrolled) .nav-link { color: rgba(255,255,255,0.85); }
.nav-link:hover,
.nav-link.active { color: var(--brand); }
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--brand);
    border-radius: 1px;
}

.nav-cta {
    margin-left: 28px;
    padding: 8px 20px;
    background: var(--brand);
    color: #fff;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s;
}
.nav-cta:hover { background: var(--brand-dark); }

.lang-switch {
    margin-left: 12px;
    padding: 6px 16px;
    min-width: 48px;
    height: 34px;
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    letter-spacing: 0.05em;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}
.lang-switch:hover { background: rgba(255,255,255,0.25); }
.header.scrolled .lang-switch {
    background: var(--brand-light);
    color: var(--brand-dark);
    border-color: var(--brand);
}
.header.scrolled .lang-switch:hover { background: var(--brand); color: #fff; }

.menu-toggle {
    display: none;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    margin-left: 16px;
}
.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    position: absolute;
    left: 4px;
    transition: 0.3s;
}
.header:not(.scrolled) .menu-toggle span { background: #fff; }
.menu-toggle span:first-child { top: 8px; }
.menu-toggle span:last-child { top: 18px; }
.menu-toggle.active span:first-child { top: 13px; transform: rotate(45deg); }
.menu-toggle.active span:last-child { top: 13px; transform: rotate(-45deg); }

/* ===== Hero ===== */
.hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
    background: #0a1628;
}
.hero-media {
    position: absolute;
    inset: 0;
}
.hero-bg {
    width: 100%;
    height: 100%;
    min-height: 100%;
    object-fit: cover;
    display: block;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to right,
        rgba(10,22,40,0.85) 0%,
        rgba(10,22,40,0.55) 45%,
        rgba(10,22,40,0.35) 100%
    );
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: left;
    max-width: 620px;
    padding: 0 60px;
}
.hero-eyebrow {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.7);
    margin-bottom: 20px;
}
.hero-title {
    font-size: clamp(1.3rem, 3.8vw, 2.8rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 8px;
}
.hero-title em {
    font-style: normal;
    color: #60d0ff;
    white-space: nowrap;
}
/* slogan — 正常文档流，在按钮下方 */
.hero-slogan-outline {
    position: relative;
    z-index: 3;
    white-space: nowrap;
    font-size: clamp(1.1rem, 2.5vw, 1.8rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.85);
    margin: 16px 0 0;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    margin-top: 28px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 26px;
    background: var(--brand);
    color: #fff;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    transition: background 0.2s, transform 0.2s;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
}
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 26px;
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.25);
    transition: background 0.2s;
    cursor: pointer;
    flex-shrink: 0;
}
.btn-secondary:hover { background: rgba(255,255,255,0.25); }

.btn-primary-light {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    background: #60d0ff;
    color: var(--navy);
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    transition: background 0.2s;
}
.btn-primary-light:hover { background: #fff; }

.btn-ghost-light {
    display: inline-flex;
    align-items: center;
    padding: 14px 28px;
    background: transparent;
    color: rgba(255,255,255,0.8);
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.2);
    transition: background 0.2s;
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.1); }

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}
.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid rgba(255,255,255,0.4);
    border-radius: 12px;
    position: relative;
}
.scroll-dot {
    width: 4px;
    height: 8px;
    background: rgba(255,255,255,0.6);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollBounce 1.5s infinite;
}
@keyframes scrollBounce {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 20px; opacity: 0.3; }
}

/* ===== Trusted Stats Bar (Kongsberg-style) ===== */
.trusted-bar {
    background: var(--bg-light);
    padding: 64px 0 72px;
}
.trusted-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 60px;
    text-align: center;
}
.trusted-heading {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    text-align: center;
}
.trusted-lead {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
.trusted-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.ts-item {
    padding: 28px 16px;
    background: #fff;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--border);
}
.ts-num {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--brand);
    line-height: 1;
}
.ts-plus, .ts-unit {
    font-size: 0.6em;
    font-weight: 600;
}
.ts-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
    line-height: 1.4;
}

/* ===== About / Commitment ===== */
/* 航海大图 Banner */
.about-hero-img {
    position: relative;
    width: 100%;
    max-height: 380px;
    overflow: hidden;
    margin-bottom: -40px;
}
.about-hero-img img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    object-position: center 35%;
}
.about-hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, var(--bg-white) 0%, rgba(255,255,255,0.7) 50%, transparent 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: stretch;
}
.about-body p {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.cert-row {
    display: flex;
    gap: 8px;
    margin-top: 24px;
}
.cert-tag {
    padding: 6px 16px;
    background: var(--brand-light);
    color: var(--brand-dark);
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
    letter-spacing: 0.05em;
}
.cert-subtitle {
    margin-top: 10px;
    font-size: 11px;
    color: rgba(0,0,0,0.35);
    letter-spacing: 0.03em;
}

/* Engineer Creative Image (实景+3D卡通) */
.about-engineer-img-wrap {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    height: 100%;
}
.about-engineer-img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}
.engineer-badge {
    position: absolute;
    bottom: 16px;
    left: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px 8px 12px;
    background: rgba(10,22,40,0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 100px;
    color: #fff;
    font-size: 13px;
    font-weight: 500;
}
.badge-logo {
    width: auto;
    height: 22px;
    object-fit: contain;
}

/* Compare Block (Kongsberg "What's new / What stays" style) */
.advantage-list {
    margin-top: 24px;
}
.advantage-list ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.advantage-list li {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}
.advantage-list li svg { flex-shrink: 0; width: 20px; }
.compare-same li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-light);
    margin-right: 8px;
    margin-top: 7px;
    display: inline-block;
}

/* Quote Block (Kongsberg CEO message style) */
.quote-block {
    padding: 28px 32px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--brand);
}
.quote-block p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    font-style: italic;
    margin-bottom: 12px;
}
.quote-footer {
    display: flex;
    align-items: center;
    gap: 8px;
}
.quote-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--brand);
}
.quote-role {
    font-size: 13px;
    color: var(--text-light);
}

/* ===== Services — Segment Cards (Kongsberg-style) ===== */
.segment-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.seg-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 360px;
    display: flex;
    align-items: flex-end;
    cursor: pointer;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.seg-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.18);
}
.seg-card-lg {
    min-height: 420px;
}

.seg-img {
    position: absolute;
    inset: 0;
}
.seg-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.seg-card:hover .seg-img img {
    transform: scale(1.05);
}

.seg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(10,22,40,0.92) 0%,
        rgba(10,22,40,0.55) 50%,
        rgba(10,22,40,0.2) 100%
    );
    transition: background 0.35s;
}
.seg-card:hover .seg-overlay {
    background: linear-gradient(
        to top,
        rgba(0,152,202,0.96) 0%,
        rgba(10,22,40,0.65) 50%,
        rgba(10,22,40,0.25) 100%
    );
}

.seg-body {
    position: relative;
    z-index: 2;
    padding: 32px 28px;
    color: #fff;
    text-align: center;
}
.seg-num {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: #60d0ff;
    margin-bottom: 8px;
    display: block;
}
.seg-body h3 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: 8px;
}
.seg-body > p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255,255,255,0.8);
    margin-bottom: 8px;
}
.seg-detail {
    font-size: 13px;
    line-height: 1.65;
    color: rgba(255,255,255,0.6);
    margin-bottom: 12px;
    display: none;
    text-align: left;
}
.seg-card:hover .seg-detail { display: block; }

.seg-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    justify-content: center;
}
.seg-tags span {
    padding: 4px 10px;
    background: rgba(255,255,255,0.12);
    border-radius: 100px;
    font-size: 11px;
    color: rgba(255,255,255,0.7);
    transition: background 0.2s;
}
.seg-card:hover .seg-tags span {
    background: rgba(255,255,255,0.22);
    color: #fff;
}

.seg-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: #60d0ff;
}

/* ===== Core Technology ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding: 0 60px;
}
.tech-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: border-color 0.3s, background 0.3s;
    text-align: left;
}
.tech-card:hover {
    border-color: rgba(96,208,255,0.25);
    background: rgba(255,255,255,0.08);
}
.tech-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    justify-content: center;
}
.tech-icon { width: 24px; height: 24px; }
.tech-card-head h3 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    letter-spacing: -0.01em;
}
.tech-desc {
    font-size: 14px;
    color:rgba(255,255,255,0.6);
    line-height: 1.5;
    margin-bottom: 16px;
    text-align: left;
}
.tech-brands {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}
.tech-brand-group {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 8px 12px;
    background: rgba(0,0,0,0.2);
    border-radius: var(--radius-sm);
    
}
.tb-name {
    font-size: 13px;
    font-weight: 700;
    color: #60d0ff;
    letter-spacing: 0.03em;
    min-width: 100px;
}
.tb-models {
    font-size: 12px;
    color: rgba(255,255,255,0.55);
    font-weight: 400;
}

/* ===== Workflow ===== */
.flow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 48px;
}
.flow-step {
    padding: 20px 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: border-color 0.3s, background 0.3s;
    text-align: left;
}
.flow-step:hover {
    border-color: var(--brand);
    background: var(--brand-light);
}
.flow-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--brand);
    letter-spacing: -0.04em;
    margin-bottom: 6px;
}
.flow-step h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 5px;
}
.flow-step p {
    font-size: 12.5px;
    color: var(--text-secondary);
    line-height: 1.45;
}

.flow-standards {
    display: flex;
    gap: 24px;
    justify-content: center;
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
}
.flow-std-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

/* ===== Support Section ===== */
.section-support {
    position: relative;
    width: 100%;
    min-height: 70vh;
    padding: 100px 0;
    overflow: hidden;
    background: #0a1628;
}
.support-bg {
    position: absolute;
    inset: 0;
}
.support-bg-img {
    width: 100%;
    height: 100%;
    min-height: 100%;
    object-fit: cover;
    display: block;
}
.support-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to right,
        rgba(10,22,40,0.88) 0%,
        rgba(10,22,40,0.75) 60%,
        rgba(10,22,40,0.55) 100%
    );
}
.support-layout {
    position: relative;
    z-index: 2;
}
.support-text {
    max-width: 560px;
    text-align: center;
    margin: 0 auto;
}
.support-text .section-eyebrow-light { margin-bottom: 16px; text-align: center; }
.support-text .section-heading-light {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    margin-bottom: 16px;
    text-align: center;
}
.support-desc {
    font-size: 16px;
    line-height: 1.7;
    color: rgba(255,255,255,0.75);
    margin-bottom: 28px;
    text-align: center;
}
.support-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
    align-items: center;
}
.support-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    justify-content: center;
}

/* ===== Contact ===== */
.contact-header { margin-bottom: 56px; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.ci-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.ci-item svg { flex-shrink: 0; margin-top: 2px; }
.ci-item strong {
    font-size: 15px;
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
}
.ci-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: nowrap;
}
.contact-link {
    color: var(--brand);
    text-decoration: none;
    transition: color 0.2s;
}
.contact-link:hover {
    color: var(--brand-dark);
    text-decoration: underline;
}
.ci-service-cities { margin-top: 16px; }
.ci-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.ci-cities {
    display: flex;
    gap: 8px;
}
.ci-cities span {
    padding: 6px 16px;
    background: var(--brand-light);
    color: var(--brand-dark);
    font-size: 13px;
    font-weight: 500;
    border-radius: 100px;
}

/* ===== Contact Form ===== */
.contact-form-wrap {
    padding: 36px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 100%;
}
.contact-form-wrap h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-group {
    position: relative;
    margin-bottom: 20px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    transition: border-color 0.2s;
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--brand);
}
.form-group label {
    position: absolute;
    top: -8px;
    left: 12px;
    padding: 0 4px;
    background: var(--bg-light);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-light);
    pointer-events: none;
    transition: color 0.2s;
}
.form-group input:focus + label,
.form-group select:focus + label,
.form-group textarea:focus + label {
    color: var(--brand);
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.f-submit {
    width: 100%;
    padding: 11px 20px;
    background: var(--brand);
    color: #fff;
    border: none;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s;
}
.f-submit:hover { background: var(--brand-dark); }

/* ===== Footer ===== */
.footer {
    background: var(--navy);
    padding: 64px 0 32px;
    color: rgba(255,255,255,0.7);
}
.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 2.5fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo-img {
    width: auto;
    height: 48px;
    object-fit: contain;
}
.footer-tagline {
    font-size: 12px;
    letter-spacing: 0.04em;
    color: #60d0ff;
    margin-top: 12px;
    white-space: nowrap !important;
    overflow: hidden;
    text-overflow: ellipsis;
}
.footer-desc {
    font-size: 13px;
    line-height: 1.6;
    color: rgba(255,255,255,0.5);
    margin-top: 8px;
    text-align: left;
}
.footer-left {
    text-align: left !important;
}
.footer-left .footer-tagline,
.footer-left .footer-desc {
    text-align: left !important;
}
.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: left;
}
.fl-col h5 {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
    text-align: left;
}
.fl-col a {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    padding: 4px 0;
    transition: color 0.2s;
    text-align: left;
}
.fl-col a:hover { color: #60d0ff; }

.footer-bottom {
    padding-top: 24px;
    text-align: left;
    font-size: 12px;
    color: rgba(255,255,255,0.35);
}

/* ===== Back to top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--brand);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, background 0.2s;
    z-index: 900;
}
.back-to-top.show { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--brand-dark); }

/* ===== Reveal animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(0);
    transition: opacity 0.7s ease;
}
.reveal.in-view { opacity: 1; }
.reveal-up {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-up.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Mobile Responsive ===== */
@media (max-width: 1024px) {
    .container, .container-narrow { padding: 0 24px; }
    .segment-grid { grid-template-columns: 1fr; padding: 0 24px; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .flow-steps { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 32px; }
    .about-hero-img img { height: 200px; }
    .about-engineer-img-wrap { margin-bottom: 16px; }
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-top { grid-template-columns: 1fr; gap: 32px; }
}

/* ===== 768px — 手机核心断点 ===== */
@media (max-width: 768px) {
    /* 全局 */
    body { overflow-x: hidden; }
    .section { padding: 48px 0 !important; }
    .container, .container-narrow {
        padding: 0 18px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .tech-grid {
        padding: 0 18px !important;
    }
    .hide-mobile { display: none !important; }

    /* 导航 */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #0a1628;
        flex-direction: column;
        padding: 80px 24px 30px;
        gap: 4px;
        transition: right 0.35s ease;
        box-shadow: -4px 0 30px rgba(0,0,0,0.3);
        z-index: 1001;
        display: flex;
    }
    .nav-menu.active { right: 0; }
    .nav-menu li {
        list-style: none;
        display: block;
        width: 100%;
    }
    .nav-menu .nav-link {
        color: rgba(255,255,255,0.85);
        font-size: 16px;
        font-weight: 500;
        padding: 12px 8px;
        border-radius: 8px;
        display: block;
        transition: background 0.15s, color 0.15s;
    }
    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background: rgba(96,208,255,0.12);
        color: #60d0ff;
    }
    /* 菜单遮罩 */
    .nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 1000;
    }
    .nav-overlay.active { display: block; }
    .nav-cta { display: none; }
    .menu-toggle { display: block; z-index: 1003; }

    /* Hero — 紧凑布局 */
    .hero {
        min-height: auto !important;
        height: auto;
        padding: 75px 0 50px !important;
        justify-content: flex-start;
        overflow: hidden;
    }
    .hero-content {
        text-align: left;
        padding: 0 16px;
        max-width: 100%;
        margin: 0;
    }
    .hero-title {
        font-size: clamp(1.05rem, 5vw, 1.55rem) !important;
        margin-bottom: 12px !important;
        line-height: 1.2;
    }
    .hero-title em {
        white-space: normal;
        display: inline;
    }
    .hero-actions {
        flex-direction: row !important;
        justify-content: flex-start;
        gap: 10px !important;
        margin-top: 4px;
        flex-wrap: nowrap;
    }
    .btn-primary, .btn-secondary {
        flex: 1 1 0;
        min-width: 0 !important;
        max-width: none !important;
        padding: 10px 12px !important;
        font-size: 12px !important;
        border-radius: 100px;
        text-align: left;
        white-space: nowrap;
        justify-content: center;
    }
    .btn-primary svg { width: 13px; height: 13px; flex-shrink: 0; }
    /* 支持区域按钮 — 与Hero按钮保持一致 */
    .btn-primary-light, .btn-ghost-light {
        padding: 10px 20px !important;
        font-size: 13px !important;
        border-radius: 100px;
    }
    .support-actions { flex-direction: row; gap: 8px; }
    .support-actions a { flex: 1; text-align: left; justify-content: center; min-width: 0; }
    .hero-scroll { display: none !important; }
    .hero-slogan-outline {
        position: relative !important;
        bottom: auto !important;
        left: auto !important;
        text-align: left;
        margin-top: 10px !important;
        margin-bottom: 0 !important;
        font-size: clamp(9px, 2.5vw, 12px) !important;
        letter-spacing: 0.04em;
        white-space: normal;
        word-break: break-word;
        opacity: 0.85;
    }

    /* 统计条 */
    .trusted-bar { padding: 36px 0 40px !important; }
    .trusted-inner { padding: 0 18px !important; box-sizing: border-box; text-align: center; }
    .trusted-heading {
        font-size: clamp(1.1rem, 3.8vw, 1.55rem) !important;
        margin-bottom: 6px !important;
        line-height: 1.25;
        text-align: center;
    }
    .trusted-lead { font-size: 12.5px !important; margin-bottom: 22px !important; line-height: 1.5; text-align: center; }
    .trusted-stats { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
    .ts-item { padding: 14px 8px !important; border-radius: 10px; }
    .ts-num { font-size: clamp(1.4rem, 4.5vw, 2rem) !important; }
    .ts-label { font-size: 11px !important; }

    /* About/Decades区域 — 标题居中 + 英文版文字量大必须压缩 */
    .about-left { text-align: left; }
    .about-left .section-eyebrow,
    .about-left .section-heading { text-align: left; margin-left: auto; margin-right: auto; }
    .about-grid { grid-template-columns: 1fr !important; gap: 22px; }
    .about-hero-img { margin-bottom: -24px; }
    .about-hero-img img { height: 160px !important; object-fit: cover; }
    .about-body p {
        font-size: 13px !important;
        line-height: 1.6 !important;
        margin-bottom: 10px !important;
    }
    .advantage-list ul { gap: 8px !important; }
    .advantage-list li {
        font-size: 12.5px !important;
        line-height: 1.45 !important;
        gap: 8px !important;
    }
    .advantage-list li svg { width: 14px; height: 14px; flex-shrink: 0; }
    .quote-block { padding: 14px 16px !important; border-radius: 10px; }
    .quote-block p { font-size: 12.5px !important; line-height: 1.55 !important; }
    .quote-name { font-size: 13px !important; }
    .quote-role { font-size: 11px !important; }
    .cert-row { gap: 5px !important; flex-wrap: wrap; margin-top: 12px !important; }
    .cert-tag { padding: 4px 10px !important; font-size: 10.5px !important; border-radius: 6px; }

    /* Section标题统一居中 */
    .section-eyebrow,
    .section-eyebrow-light { font-size: 11px !important; letter-spacing: 0.15em !important; text-align: center !important; }
    .section-heading, .section-heading-light { font-size: clamp(1.15rem, 4vw, 1.65rem) !important; line-height: 1.25; text-align: center !important; }
    .section-header-center { margin-bottom: 28px !important; text-align: center !important; }
    .section-lead, .section-lead-light {
        font-size: 12.5px !important;
        line-height: 1.6 !important;
        max-width: 100%;
        margin: 10px auto 0 !important;
        text-align: center !important;
    }

    /* 业务板块卡片 */
    .segment-grid {
        grid-template-columns: 1fr !important;
        padding: 0 18px !important;
        gap: 10px !important;
        max-width: 100%;
    }
    .seg-card { min-height: 200px !important; border-radius: 12px; }
    .seg-card-lg { min-height: 240px !important; }
    .seg-body { padding: 18px 15px !important; }
    .seg-body h3 {
        font-size: clamp(0.95rem, 3.5vw, 1.2rem) !important;
        margin-bottom: 4px !important;
        line-height: 1.25;
    }
    .seg-body > p { font-size: 12px !important; margin-bottom: 4px !important; line-height: 1.45; }
    .seg-num { font-size: 11px !important; }
    .seg-tags { gap: 3px !important; margin-top: 8px !important; }
    .seg-tags span { padding: 2px 7px !important; font-size: 9.5px !important; border-radius: 4px; }
    .seg-detail { display: none !important; }
    .seg-link { font-size: 12px !important; margin-top: 8px !important; }

    /* 核心技术 */
    .tech-grid { grid-template-columns: 1fr !important; gap: 10px; }
    .tech-card { padding: 16px 14px !important; border-radius: 12px; }
    .tech-card-head h3 { font-size: 14px !important; }
    .tech-desc { font-size: 12px !important; margin-bottom: 10px !important; }
    .tech-brand-group { padding: 5px 8px !important; border-radius: 6px; gap: 6px; }
    .tb-name { font-size: 11px !important; min-width: 60px; }
    .tb-models { font-size: 10px !important; word-break: break-all; }
    .tech-brands { min-width: 0 !important; gap: 4px; flex-wrap: wrap; }
    .tech-icon { width: 28px; height: 28px; }

    /* 流程 */
    .flow-steps { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; margin-top: 26px !important; }
    .flow-step { padding: 14px 12px !important; border-radius: 10px; }
    .flow-num { font-size: 22px !important; margin-bottom: 4px; }
    .flow-step h4 { font-size: 13px !important; margin-bottom: 2px; }
    .flow-step p { font-size: 11px !important; line-height: 1.4; }
    .flow-standards { flex-wrap: wrap; gap: 8px !important; margin-top: 22px !important; padding-top: 14px !important; }
    .flow-std-item { font-size: 12px !important; padding: 5px 10px !important; }

    /* 支持区域 — 标题居中 */
    .support-text { text-align: left; }
    .support-text .section-eyebrow-light,
    .support-text .section-heading-light { text-align: left; margin-left: auto; margin-right: auto; font-size: inherit !important; }
    .support-desc { font-size: 12.5px !important; line-height: 1.6; }
    .support-list li { font-size: 13px !important; gap: 8px; }

    /* 联系我们 — 与其他区域等宽 */
    .contact-header { margin-bottom: 26px; }
    .contact-grid { grid-template-columns: 1fr !important; gap: 22px; }
    .ci-item { gap: 10px; }
    .ci-item strong { font-size: 13px; }
    .ci-item p { font-size: 12px; white-space: nowrap; }
    .ci-cities { gap: 5px; flex-wrap: wrap; }
    .ci-cities span { padding: 4px 10px; font-size: 11px; }
    .contact-form-wrap {
        padding: 16px 12px !important;
        border-radius: 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .contact-form-wrap h3 { font-size: 15px !important; margin-bottom: 12px; }
    .form-row { grid-template-columns: 1fr !important; gap: 8px; }
    .form-group { margin-bottom: 10px; }
    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100% !important;
        max-width: 100% !important;
        font-size: 13px !important;
        box-sizing: border-box !important;
        padding: 9px 10px !important;
        border-radius: 8px;
    }
    .form-group label { font-size: 11px !important; top: -7px !important; left: 10px !important; padding: 0 3px !important; }
    .form-group textarea { min-height: 70px; }
    .f-submit { padding: 10px 18px !important; font-size: 13px !important; }

    /* Footer */
    .footer-links { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    .footer-bottom { font-size: 11px; }
}

/* ===== 480px — 小屏手机 ===== */
@media (max-width: 480px) {
    .section { padding: 38px 0 !important; }
    .container, .container-narrow { padding: 0 14px !important; }
    .segment-grid { padding: 0 14px !important; }
    .trusted-inner { padding: 0 14px !important; }
    .hero { padding: 70px 0 50px !important; }
    .hero-content { padding: 0 12px; }
    .hero-title { font-size: clamp(1rem, 5.5vw, 1.45rem) !important; }
    .hero-slogan-outline { font-size: 10px !important; letter-spacing: 0.03em; }
    .btn-primary, .btn-secondary {
        padding: 10px 12px !important;
        font-size: 11px !important;
    }
    .trusted-stats { gap: 6px !important; }
    .ts-item { padding: 12px 6px !important; }
    .ts-num { font-size: clamp(1.3rem, 5vw, 1.85rem) !important; }
    .about-hero-img img { height: 140px !important; }
    .about-body p { font-size: 12.5px !important; }
    .seg-card { min-height: 180px !important; }
    .seg-card-lg { min-height: 210px !important; }
    .seg-body { padding: 14px 12px !important; }
    .seg-body h3 { font-size: 0.95rem !important; }
    .seg-body > p { font-size: 11.5px !important; }
    .seg-tags span { font-size: 9px !important; padding: 2px 6px !important; }
    .flow-step { padding: 12px 10px !important; }
    .contact-form-wrap { padding: 14px 10px !important; }
    .contact-form-wrap h3 { font-size: 14px !important; }
    .form-group input, .form-group select, .form-group textarea { font-size: 12px !important; padding: 8px 10px !important; }
    .form-group label { font-size: 10px !important; }
    .f-submit { padding: 9px 16px !important; font-size: 12px !important; }
    .btn-primary-light, .btn-ghost-light { padding: 9px 16px !important; font-size: 12px !important; }
    .support-actions { flex-direction: row; gap: 8px; }
    .support-actions a { flex: 1; text-align: left; justify-content: center; min-width: 0; }
    .tech-brand-group { flex-direction: column; align-items: flex-start; gap: 2px; padding: 6px 8px !important; }
    .section-eyebrow,
    .section-eyebrow-light { font-size: 10px !important; }
    /* Footer 手机：公司名不换行 */
    .footer-brand { min-width: 0; }
    .footer-tagline { white-space: nowrap !important; font-size: 10px !important; letter-spacing: 0.01em !important; }
    .footer-desc { font-size: 11px !important; }
}

/* ===== Form Success Modal ===== */
.form-success-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.45);
    justify-content: center;
    align-items: center;
    padding: 24px;
    box-sizing: border-box;
}
.form-success-modal[style*="flex"],
.form-success-modal[style*="block"] {
    display: flex !important;
}
.form-success-inner {
    background: #fff;
    border-radius: 20px;
    padding: 48px 40px;
    text-align: left;
    max-width: 420px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.18);
    animation: fadeUp 0.5s ease;
}
.form-success-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(0,152,202,0.1);
    color: #0098CA;
    font-size: 28px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}
.form-success-inner h3 {
    font-size: 22px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 10px;
}
.form-success-inner p {
    font-size: 14.5px;
    color: #86868b;
    line-height: 1.7;
    margin-bottom: 28px;
}
.form-success-inner .btn-primary {
    padding: 12px 32px;
    font-size: 15px;
}

/* ===== Contact Back Arrow ===== */
.contact-back {
    text-align: left;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.back-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}
.back-arrow:hover {
    color: var(--brand);
}
.back-arrow svg {
    flex-shrink: 0;
}

/* ===== Support Section Buttons — equal width, side by side ===== */
.support-actions {
    display: flex;
    flex-direction: row;
    gap: 16px;
}
.support-actions a {
    flex: 1;
    text-align: left;
    justify-content: center;
    min-width: 0;
}