/* ===== 设计令牌 ===== */
:root {
    --bg-primary: #0d0d0f;
    --bg-secondary: #15151a;
    --bg-card: rgba(255, 255, 255, 0.035);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);
    --text-primary: #ffffff;
    --text-secondary: rgba(235, 235, 240, 0.72);
    --text-muted: rgba(235, 235, 240, 0.45);
    --accent-blue: #0a84ff;
    --accent-cyan: #32ade6;
    --accent-green: #30d158;
    --accent-orange: #ff9f0a;
    --accent-purple: #bf5af2;
    --accent-red: #ff375f;
    --gradient-primary: linear-gradient(135deg, #0a84ff, #32ade6);
    --gradient-text: linear-gradient(135deg, #ffffff 0%, #32ade6 60%, #0a84ff 100%);
    --font-display: 'Space Grotesk', 'Noto Sans SC', -apple-system, sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, sans-serif;
    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.005em;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { width: 100%; max-width: none; margin: 0 auto; padding: 0 clamp(20px, 3vw, 48px); }
section[id] { scroll-margin-top: 96px; }

/* ===== 动态背景 ===== */
#bgCanvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.45; }
.gradient-orb {
    position: fixed; border-radius: 50%; filter: blur(140px);
    opacity: 0.28; z-index: 0; pointer-events: none;
    animation: float 25s ease-in-out infinite;
}
.orb-1 { width: 600px; height: 600px; background: var(--accent-blue); top: -200px; left: -180px; }
.orb-2 { width: 500px; height: 500px; background: var(--accent-cyan); top: 40%; right: -160px; animation-delay: -10s; }
.orb-3 { width: 550px; height: 550px; background: #00c4d4; bottom: -200px; left: 30%; animation-delay: -18s; }
@keyframes float { 0%, 100% { transform: translate(0,0) scale(1); } 50% { transform: translate(60px,-50px) scale(1.08); } }

.glass {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
}

/* ===== 顶部信息栏 ===== */
.topbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(13, 13, 15, 0.85); backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem; color: var(--text-secondary);
    transition: transform 0.4s ease;
}
.topbar.hide { transform: translateY(-100%); }
.topbar .container {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 8px; padding-bottom: 8px; gap: 8px; flex-wrap: wrap;
}
.tb-left, .tb-right { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.tb-item { display: inline-flex; align-items: center; gap: 6px; }
.tb-item svg { width: 14px; height: 14px; color: var(--accent-blue); }
.tb-tag { color: var(--accent-blue); font-weight: 500; }
.tb-hot a { color: var(--accent-green); font-weight: 600; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed; top: 36px; left: 0; right: 0; z-index: 999;
    background: rgba(13, 13, 15, 0.88); backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    transition: top 0.4s ease;
}
.topbar.hide ~ .navbar,
body.scrolled .navbar { top: 0; }
.nav-container { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
    width: 40px; height: 40px; border-radius: 10px;
    background: #fff;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.25); flex-shrink: 0;
    overflow: hidden;
}
.logo-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-family: var(--font-display); font-size: 1.12rem; font-weight: 700; letter-spacing: -0.02em; position: relative; }
.logo-text .tm { font-family: var(--font-display); font-size: 0.46rem; font-weight: 600; margin-left: 2px; vertical-align: super; color: var(--text-secondary); letter-spacing: 0.02em; }
.logo-text em { font-style: normal; font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.15em; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 10px 14px; font-size: 0.9rem; font-weight: 500;
    color: var(--text-secondary); border-radius: 8px;
    transition: all 0.25s var(--ease); white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--accent-blue); }
.caret { width: 12px; height: 12px; transition: transform 0.3s ease; }
.has-dropdown:hover .caret,
.has-dropdown.open .caret { transform: rotate(180deg); }

/* hover 透明桥接区，防止移动鼠标时下拉消失 */
.dropdown-trigger { position: relative; }
.dropdown-trigger::after { content: ''; position: absolute; left: 0; right: 0; top: 100%; height: 18px; z-index: 60; }

.dropdown {
    position: absolute; top: 100%; left: 50%;
    transform: translateX(-50%) translateY(12px);
    padding-top: 18px;
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity 0.28s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
    z-index: 100;
}
.has-dropdown:hover .dropdown,
.dropdown:hover,
.has-dropdown.open .dropdown {
    opacity: 1; visibility: visible; pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.dropdown-inner {
    background: #ffffff;
    border: 1px solid rgba(15, 21, 38, 0.08);
    border-radius: 16px; padding: 10px;
    box-shadow: 0 24px 60px rgba(15, 21, 38, 0.18), 0 6px 18px rgba(15, 21, 38, 0.08);
    min-width: 320px;
}
.dropdown-wide .dropdown-inner { min-width: 500px; }
.dropdown-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.dd-link {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 14px; border-radius: 10px;
    transition: all 0.25s var(--ease);
}
.dd-link:hover { background: rgba(10, 132, 255, 0.08); }
.dd-ico { width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0; background: rgba(10, 132, 255, 0.08); display: flex; align-items: center; justify-content: center; }
.dd-ico svg { width: 20px; height: 20px; }
.dd-txt { display: flex; flex-direction: column; line-height: 1.35; }
.dd-txt b { font-size: 0.9rem; font-weight: 600; color: #0f1526; }
.dd-txt em { font-style: normal; font-size: 0.73rem; color: #6b7388; }
.c-blue { color: var(--accent-blue); } .c-cyan { color: #0088b5; }
.c-green { color: #1aa34a; } .c-orange { color: #cc7700; }
.c-purple { color: #8b3fbf; } .c-red { color: #d70015; }

.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-phone { display: flex; flex-direction: column; line-height: 1.2; text-align: right; }
.nav-phone small { font-size: 0.66rem; color: var(--text-muted); letter-spacing: 0.08em; }
.nav-phone strong { font-size: 0.92rem; font-family: var(--font-display); color: var(--accent-blue); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--text-primary); transition: var(--ease); border-radius: 2px; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 26px; border-radius: 50px; font-size: 0.93rem; font-weight: 500;
    cursor: pointer; transition: all 0.3s var(--ease); border: none; font-family: var(--font-body);
    white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: 0.82rem; }
.btn-lg { padding: 15px 32px; font-size: 1rem; }
.btn-primary {
    background: var(--accent-blue); color: #fff;
    box-shadow: 0 4px 20px rgba(10,132,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(10,132,255,0.45); }
.btn-outline { background: transparent; border: 1px solid var(--border-hover); color: var(--text-primary); }
.btn-outline:hover { border-color: var(--accent-blue); background: rgba(10,132,255,0.06); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,0.05); border: 1px solid var(--border); color: var(--text-primary); }
.btn-ghost:hover { border-color: var(--accent-cyan); transform: translateY(-2px); }

/* ===== Hero ===== */
.hero {
    position: relative; z-index: 1;
    min-height: 100vh;
    display: flex; align-items: center;
    padding: 156px 0 72px;
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero-photo {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; object-position: center 55%;
    filter: saturate(0.88) brightness(0.88) contrast(1.05);
    transform: scale(1.04);
}
.hero-scrim {
    position: absolute; inset: 0; z-index: 1;
    background:
        linear-gradient(180deg, rgba(6,8,18,0.50) 0%, rgba(6,10,24,0.25) 40%, rgba(8,12,26,0.20) 65%, rgba(8,10,22,0.55) 100%),
        linear-gradient(90deg, rgba(4,8,22,0.88) 0%, rgba(4,8,22,0.65) 30%, rgba(4,8,22,0.35) 55%, rgba(4,8,22,0) 80%);
}
.hero-inner { position: relative; z-index: 2; width: 100%; }
.hero-copy {
    max-width: 720px;
    color: #fff;
}
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5.2vw, 4.4rem);
    font-weight: 700; line-height: 1.12; letter-spacing: -0.025em;
    margin-bottom: 24px;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 7px 16px; background: rgba(255,255,255,0.05);
    border: 1px solid var(--border); border-radius: 50px;
    font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 24px;
}
.badge-dot { width: 7px; height: 7px; background: var(--accent-green); border-radius: 50%; box-shadow: 0 0 8px var(--accent-green); animation: ledPulse 2s infinite; }
.gradient-text {
    background: var(--gradient-text); background-size: 200% auto;
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}
@keyframes gradientShift { 0%,100% { background-position: 0% center; } 50% { background-position: 100% center; } }
@keyframes ledPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }
.hero-sub { font-size: clamp(1rem, 1.4vw, 1.15rem); color: var(--text-secondary); line-height: 1.9; max-width: 780px; margin-bottom: 30px; }
.hero-sub b { color: var(--accent-cyan); font-weight: 500; }
.hero-scan { display: flex; align-items: center; gap: 12px; margin-bottom: 34px; font-size: clamp(0.95rem, 1.3vw, 1.1rem); color: var(--text-secondary); }
.scan-label { color: var(--accent-green); font-weight: 500; }
.type-text { color: var(--accent-cyan); font-weight: 600; min-width: 130px; display: inline-block; }
.type-caret { display: inline-block; width: 2px; height: 1.1em; background: var(--accent-cyan); animation: ledPulse 1s infinite; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: clamp(26px, 5vw, 72px); flex-wrap: wrap; }
.stat-num { font-family: var(--font-display); font-size: clamp(2rem, 3vw, 2.8rem); font-weight: 700; line-height: 1; color: var(--accent-blue); }
.stat-num em { font-style: normal; font-size: 0.5em; color: var(--text-secondary); }
.stat-label { font-size: 0.78rem; color: var(--text-muted); margin-top: 7px; }

/* ===== 跑马灯 ===== */
.marquee {
    position: relative; z-index: 1;
    padding: 16px 0; background: rgba(21,21,26,0.6);
    border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    overflow: hidden;
}
.marquee-track { display: flex; gap: 48px; white-space: nowrap; width: max-content; animation: marquee 36s linear infinite; }
.marquee-track span { font-family: var(--font-display); font-size: 0.88rem; color: var(--text-muted); font-weight: 500; display: inline-flex; align-items: center; }
.marquee-track span::after { content: ''; width: 4px; height: 4px; background: var(--accent-blue); border-radius: 50%; margin-left: 38px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ===== 通用区块 ===== */
.section { position: relative; z-index: 1; padding: 96px 0; }
.section-alt { background: rgba(21,21,26,0.5); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-block; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.25em; color: var(--accent-blue); text-transform: uppercase; margin-bottom: 14px; }
.section-title { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 14px; color: var(--text-primary); }
.section-desc { font-size: 1rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== 浅色主题：白底卡片风 ===== */
.section-light {
    --bg-primary: #f5f7fb;
    --bg-card: #ffffff;
    --border: rgba(18, 26, 48, 0.08);
    --border-hover: rgba(10, 132, 255, 0.35);
    --text-primary: #0f1526;
    --text-secondary: #4a5472;
    --text-muted: #8b94ad;
    background: #f5f7fb;
}
.section-light .section-tag { color: #0a6fe0; }
.section-light .section-head .section-title {
    color: #0f1526; background: none; -webkit-text-fill-color: currentColor;
}
.section-light .section-title .gradient-text,
.section-light .gradient-text {
    background: linear-gradient(100deg, #0a84ff 0%, #32ade6 100%);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
    animation: none;
}
.section-light .section-desc { color: #4a5472; }
/* 核心业务卡片在浅色底上 */
.section-light#services .feature-row,
.section-light .feature-row {
    background: #ffffff;
    border: 1px solid rgba(18,26,48,0.08);
    box-shadow: 0 2px 14px rgba(18, 26, 48, 0.04);
    transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}
.section-light#services .feature-row:hover,
.section-light .feature-row:hover {
    border-color: rgba(10,132,255,0.32);
    box-shadow: 0 10px 30px rgba(18, 26, 48, 0.08);
    transform: translateY(-3px);
}
.section-light#services .feature-row + .feature-row,
.section-light .feature-row + .feature-row { border-top: none; }
.section-light .fr-body h3 {
    color: #0f1526;
}
.section-light#services .fr-body h3 {
    color: #0f1526;
    background: none;
    -webkit-text-fill-color: initial;
}
.section-light .fr-body p {
    color: #4a5472;
}
.section-light .fr-label {
    color: var(--theme);
}
.section-light #solutions .fr-body h3,
.section-light .solutions-list .fr-body h3 {
    background: linear-gradient(100deg, #0f1526 30%, var(--theme) 100%);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.section-light .fr-tags span {
    color: var(--theme);
    border: 1px solid rgba(var(--theme-rgb), 0.35);
    background: rgba(var(--theme-rgb), 0.08);
}
.section-light .fr-link {
    color: var(--theme);
}
.section-light .case-card,
.section-light .case-featured {
    background: #ffffff;
    border: 1px solid rgba(18,26,48,0.08);
    backdrop-filter: none; -webkit-backdrop-filter: none;
    box-shadow: 0 2px 14px rgba(18, 26, 48, 0.05);
}
.section-light .case-card:hover {
    box-shadow: 0 14px 40px rgba(18, 26, 48, 0.12);
}
.section-light .cf-body h3,
.section-light .cc-body h3 { color: #0f1526; }
.section-light .cf-body p { color: #4a5472; }
.section-light .cc-body p { color: #4a5472; }
.section-light .cc-meta { color: #8b94ad; }
.section-light .cc-badge {
    background: rgba(255,255,255,0.94);
    border: 1px solid rgba(10,132,255,0.3);
    color: #0a6fe0;
}
.section-light .cf-badge {
    background: var(--accent-blue);
    color: #fff;
}
.section-light .cp {
    background: rgba(10,132,255,0.06);
    border: 1px solid rgba(10,132,255,0.18);
}
.section-light .cp span { color: #8b94ad; }
.section-light .cp b { color: #0a6fe0; }
.section-light .btn-outline {
    border-color: rgba(15,21,38,0.25); color: #0f1526;
}
.section-light .btn-outline:hover {
    border-color: var(--accent-blue); color: var(--accent-blue); background: rgba(10,132,255,0.05);
}
.section-light .about-media img,
.section-light .atag,
.section-light .cert-card,
.section-light .info-card,
.section-light .process-step {
    border-color: rgba(18,26,48,0.08);
    background: #ffffff;
    backdrop-filter: none; -webkit-backdrop-filter: none;
    box-shadow: 0 2px 14px rgba(18, 26, 48, 0.04);
}
.section-light .cert-card figcaption { color: #0f1526; }
.section-light .cert-card em { color: #0a6fe0; }
.section-light .atag span,
.section-light .process-step h3 { color: #0f1526; }
.section-light .atag em,
.section-light .process-step p { color: #5a6178; }
.section-light .atag:hover {
    border-color: rgba(10,132,255,0.35);
}
.section-light .step-num { color: #0a6fe0; }
.section-light .info-card h3 { color: #0f1526; }
.section-light .info-card {
    background: #ffffff;
    border: 1px solid rgba(18,26,48,0.08);
}
.section-light .info-card p { color: #4a5472; }
.section-light .form-group label { color: #4a5472; }
.section-light .form-group input,
.section-light .form-group textarea {
    background: #ffffff;
    border: 1px solid rgba(18,26,48,0.12);
    color: #0f1526;
}
.section-light .form-group input::placeholder,
.section-light .form-group textarea::placeholder { color: #a5adc0; }
.section-light .form-group input:focus,
.section-light .form-group textarea:focus {
    border-color: var(--accent-blue);
    background: #ffffff;
}
.section-light .stat-num { color: var(--accent-blue); }

/* ===== 主题色 ===== */
.theme-blue   { --theme: #0a84ff; --theme-rgb: 10,132,255; }
.theme-cyan   { --theme: #32ade6; --theme-rgb: 50,173,230; }
.theme-green  { --theme: #30d158; --theme-rgb: 48,209,88; }
.theme-orange { --theme: #ff9f0a; --theme-rgb: 255,159,10; }
.theme-purple { --theme: #bf5af2; --theme-rgb: 191,90,242; }
.theme-red    { --theme: #ff375f; --theme-rgb: 255,55,95; }

/* ===== 通用 feature-row 基础样式（solutions.html / cases.html 共用） ===== */
.feature-row {
    --theme: #0a84ff;
    --theme-rgb: 10,132,255;
    position: relative;
    display: grid; grid-template-columns: minmax(300px, 38%) 1fr;
    align-items: stretch;
    background: transparent; border: none; border-radius: 0;
    padding: 0;
    transition: background 0.4s var(--ease);
    min-height: 220px;
}
.feature-row + .feature-row { border-top: 1px solid var(--border); }
.feature-row:hover { background: rgba(var(--theme-rgb), 0.025); }
.fr-media {
    position: relative; display: block;
    min-height: 220px; overflow: hidden; background: #0e0e12;
}
.fr-media img {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; transition: transform 0.8s var(--ease);
}
.feature-row:hover .fr-media img { transform: scale(1.05); }
.fr-media::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(120deg, rgba(var(--theme-rgb),0.10) 0%, transparent 50%, rgba(0,0,0,0.35) 100%);
}
.fr-body {
    padding: clamp(22px, 2.8vw, 40px) clamp(20px, 3vw, 56px);
    display: flex; flex-direction: column; justify-content: center;
}
.fr-label {
    font-family: var(--font-display); font-size: 0.72rem; font-weight: 600;
    letter-spacing: 0.24em; color: var(--theme); text-transform: uppercase;
    margin-bottom: 10px;
}
.fr-body h3 {
    font-size: clamp(1.35rem, 1.8vw, 1.85rem); font-weight: 700;
    letter-spacing: -0.012em; margin-bottom: 10px; line-height: 1.25;
}
.fr-body p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; max-width: 720px; }
.fr-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.fr-tags span {
    font-size: 0.76rem; padding: 5px 13px; border-radius: 50px;
    color: rgba(var(--theme-rgb), 1);
    border: 1px solid rgba(var(--theme-rgb), 0.35);
    background: rgba(var(--theme-rgb), 0.08);
}
.fr-link {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: 0.88rem; font-weight: 600; color: var(--theme);
    transition: gap 0.3s var(--ease); align-self: flex-start;
}
.fr-link svg { width: 16px; height: 16px; transition: transform 0.3s var(--ease); }
.fr-link:hover { gap: 12px; }
.fr-link:hover svg { transform: translateX(3px); }

/* ===== 首页核心业务：紧凑卡片网格 ===== */
#services .feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 18px;
    margin: 0;
}
#services .feature-row {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 0;
    display: flex;
    min-height: 168px;
    align-items: stretch;
    overflow: hidden;
    transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
#services .feature-row:hover {
    transform: translateY(-3px);
    border-color: rgba(var(--theme-rgb), 0.38);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(var(--theme-rgb),0.08);
}
#services .feature-row + .feature-row { border-top: none; }
#services .fr-media {
    flex-shrink: 0;
    width: 150px;
    min-height: 168px;
    height: 100%;
}
#services .fr-media::after {
    background: linear-gradient(100deg, rgba(var(--theme-rgb),0.14) 0%, rgba(0,0,0,0.25) 70%);
}
#services .fr-body {
    padding: 20px 22px;
    display: flex; flex-direction: column; justify-content: center;
    min-width: 0;
}
#services .fr-label { font-size: 0.66rem; letter-spacing: 0.2em; margin-bottom: 6px; }
#services .fr-body h3 { font-size: 1.12rem; margin-bottom: 6px; line-height: 1.25; }
#services .fr-body p {
    font-size: 0.86rem; line-height: 1.55; margin-bottom: 10px;
    color: var(--text-secondary);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
#services .fr-tags { margin-bottom: 10px; gap: 6px; }
#services .fr-tags span { font-size: 0.68rem; padding: 3px 10px; }
#services .fr-link { font-size: 0.8rem; }

/* ===== 核心业务分层：更多专项业务（紧凑卡） ===== */
.svc-subhead {
    display: flex; align-items: baseline; gap: 14px;
    margin: 38px 0 18px;
}
.svc-subhead em {
    font-style: normal; font-size: 0.66rem; letter-spacing: 0.22em;
    color: rgb(var(--theme-rgb, 10, 132, 255)); font-weight: 700;
}
.svc-subhead h3 { font-size: 1.15rem; color: var(--text-primary); }
.svc-subhead i { flex: 1; height: 1px; align-self: center; background: linear-gradient(90deg, var(--border), transparent); }
.feature-compact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 14px;
}
.fc-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid rgb(var(--theme-rgb));
    border-radius: 14px;
    padding: 18px 20px 16px;
    display: flex; flex-direction: column;
    text-decoration: none;
    transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.fc-card:hover {
    transform: translateY(-3px);
    border-color: rgba(var(--theme-rgb), 0.4);
    border-left-color: rgb(var(--theme-rgb));
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
}
.fc-card em {
    font-style: normal; font-size: 0.62rem; letter-spacing: 0.2em;
    color: rgb(var(--theme-rgb)); font-weight: 700;
}
.fc-card h4 { font-size: 1.02rem; color: var(--text-primary); margin: 6px 0 7px; line-height: 1.3; }
.fc-card p {
    font-size: 0.84rem; line-height: 1.6; color: var(--text-secondary);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.fc-card .fc-link {
    margin-top: 12px; display: inline-flex; align-items: center; gap: 6px;
    font-size: 0.78rem; font-weight: 600; color: rgb(var(--theme-rgb));
}
.fc-card .fc-link svg { width: 14px; height: 14px; transition: transform 0.3s var(--ease); }
.fc-card:hover .fc-link svg { transform: translateX(4px); }

/* ===== 首页解决方案：容器内大圆角卡 + 交替 + 特写渐变标题 ===== */
.solutions-list {
    display: flex; flex-direction: column;
    margin: 0;
    border: 1px solid var(--border);
    border-radius: 22px;
    overflow: hidden;
    background: rgba(255,255,255,0.015);
}
.solutions-list .fr-body h3 {
    background: linear-gradient(100deg, #ffffff 25%, var(--theme) 95%);
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.solutions-list .feature-row:nth-child(even) { grid-template-columns: 1fr minmax(300px, 38%); }
.solutions-list .feature-row:nth-child(even) .fr-media { order: 2; }
.solutions-list .feature-row:nth-child(even) .fr-body { order: 1; }

/* ===== 工程案例 ===== */
.case-featured { display: grid; grid-template-columns: 1.2fr 1fr; border-radius: 28px; overflow: hidden; margin-bottom: 24px; }
.cf-media { position: relative; min-height: 320px; }
.cf-media img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.cf-badge { position: absolute; top: 14px; left: 14px; padding: 6px 14px; background: var(--accent-blue); border-radius: 50px; font-size: 0.74rem; color: #fff; font-weight: 600; }
.cf-body { padding: 38px; display: flex; flex-direction: column; justify-content: center; }
.cf-body h3 { font-size: 1.35rem; font-weight: 600; margin-bottom: 12px; letter-spacing: -0.01em; }
.cf-body p { color: var(--text-secondary); line-height: 1.75; margin-bottom: 20px; }
.case-params { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.cp { padding: 11px 14px; background: rgba(10,132,255,0.08); border: 1px solid rgba(10,132,255,0.15); border-radius: 10px; }
.cp span { font-size: 0.7rem; color: var(--text-muted); display: block; margin-bottom: 2px; }
.cp b { font-size: 0.84rem; color: var(--accent-cyan); }

.cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.case-card { border-radius: 18px; overflow: hidden; transition: all 0.35s var(--ease); display: flex; flex-direction: column; }
.case-card:hover { transform: translateY(-5px); border-color: var(--border-hover); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.cc-media { position: relative; height: clamp(240px, 21vw, 400px); overflow: hidden; }
.cc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.case-card:hover .cc-media img { transform: scale(1.06); }
.cc-badge { position: absolute; top: 10px; left: 10px; padding: 4px 11px; background: rgba(13,13,15,0.88); backdrop-filter: blur(10px); border: 1px solid var(--border); border-radius: 50px; font-size: 0.7rem; color: var(--accent-blue); }
.cc-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.cc-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.cc-body p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 10px; flex: 1; }
.cc-meta { display: flex; gap: 12px; font-size: 0.72rem; color: var(--text-muted); }

/* ===== 关于我们 ===== */
.about-wrap { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 56px; align-items: center; margin-bottom: 70px; }
.about-media { position: relative; }
.about-media img { width: 100%; border-radius: 24px; border: 1px solid var(--border); }
.about-badge {
    position: absolute; left: -18px; bottom: 28px;
    display: flex; align-items: center; gap: 14px;
    padding: 16px 22px; border-radius: 18px;
    background: rgba(21,21,26,0.95); backdrop-filter: blur(16px);
    border: 1px solid rgba(10,132,255,0.3);
    box-shadow: 0 16px 40px rgba(0,0,0,0.45);
}
.ab-year { font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; color: var(--accent-blue); line-height: 1; }
.ab-year em { font-style: normal; font-size: 1.2rem; }
.ab-text { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }
.about-copy .section-title { text-align: left; }
.about-copy .section-tag { margin-bottom: 12px; }
.about-copy p { color: var(--text-secondary); line-height: 1.85; margin-bottom: 16px; }
.about-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 26px; }
.atag { padding: 16px 18px; border-radius: 14px; background: var(--bg-card); border: 1px solid var(--border); transition: all 0.3s var(--ease); }
.atag:hover { border-color: rgba(10,132,255,0.4); transform: translateY(-3px); }
.atag span { display: block; font-weight: 600; font-size: 0.95rem; margin-bottom: 3px; }
.atag em { font-style: normal; font-size: 0.76rem; color: var(--text-muted); }

.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.process-step { padding: 30px 24px; border-radius: 18px; transition: all 0.35s var(--ease); }
.process-step:hover { transform: translateY(-5px); border-color: rgba(10,132,255,0.35); }
.step-num {
    font-family: var(--font-display); font-size: 1.9rem; font-weight: 700;
    background: var(--gradient-text); -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; margin-bottom: 12px;
}
.process-step h3 { font-size: 1.02rem; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.7; }

/* ===== 资质荣誉 ===== */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 22px; }
.cert-card { padding: 18px 18px 20px; border-radius: 18px; text-align: center; transition: all 0.35s var(--ease); }
.cert-card:hover { transform: translateY(-6px); border-color: rgba(10,132,255,0.4); box-shadow: 0 22px 55px rgba(0,0,0,0.45); }
.cert-card img {
    width: 100%; height: 340px; object-fit: cover;
    border-radius: 12px; border: 1px solid var(--border); background: #101014;
}
.cert-card figcaption { margin-top: 14px; font-size: 0.92rem; font-weight: 600; }
.cert-card em { display: block; margin-top: 4px; font-style: normal; font-size: 0.72rem; color: var(--accent-blue); letter-spacing: 0.1em; }

/* ===== 联系我们 ===== */
.contact-wrap { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 14px; }
.info-card { display: flex; align-items: center; gap: 16px; padding: 20px 22px; border-radius: 16px; transition: all 0.3s var(--ease); }
.info-card:hover { border-color: rgba(10,132,255,0.35); transform: translateX(4px); }
.info-icon {
    width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
    background: rgba(10,132,255,0.12); color: var(--accent-blue);
    display: flex; align-items: center; justify-content: center;
}
.info-icon svg { width: 22px; height: 22px; }
.info-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 3px; }
.info-card p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.6; }
.info-card a { color: var(--accent-cyan); }
.info-card a:hover { color: var(--accent-blue); }

.contact-form { padding: 34px; border-radius: 22px; }
.contact-form h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 0.82rem; color: var(--text-secondary); font-weight: 500; margin-bottom: 8px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 13px 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border); border-radius: 12px;
    color: var(--text-primary); font-family: var(--font-body); font-size: 0.92rem;
    outline: none; transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent-blue); background: rgba(10,132,255,0.05);
    box-shadow: 0 0 0 3px rgba(10,132,255,0.15);
}
.form-group select option { background: #15151a; color: #fff; }
.form-group textarea { resize: vertical; }
.btn-submit { width: 100%; margin-top: 4px; }
.form-tip { text-align: center; font-size: 0.76rem; color: var(--text-muted); margin-top: 12px; }
.form-success {
    display: none; text-align: center; padding: 40px 20px;
    color: var(--accent-green); font-size: 1rem;
}
.form-success.show { display: block; }
.contact-form.submitted > *:not(.form-success) { display: none; }

/* ===== 页脚 ===== */
.footer { position: relative; z-index: 1; border-top: 1px solid var(--border); padding: 60px 0 0; background: rgba(13,13,15,0.85); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 44px; }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.8; margin: 18px 0; }
.footer-cert { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-cert span { font-size: 0.72rem; padding: 4px 12px; border-radius: 50px; border: 1px solid var(--border); color: var(--text-secondary); }
.footer-col h4 { font-size: 0.92rem; font-weight: 600; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 11px; }
.footer-col ul a { font-size: 0.85rem; color: var(--text-muted); transition: color 0.25s; }
.footer-col ul a:hover { color: var(--accent-blue); }
.footer-contact li { display: flex; gap: 10px; }
.footer-contact svg { width: 16px; height: 16px; color: var(--accent-blue); flex-shrink: 0; margin-top: 3px; }
.footer-contact span { font-size: 0.83rem; color: var(--text-muted); line-height: 1.7; }
.footer-contact a { color: var(--text-muted); }
.footer-contact a:hover { color: var(--accent-blue); }
.footer-bottom { border-top: 1px solid var(--border); padding: 18px 0; }
.footer-bottom p { color: var(--text-muted); font-size: 0.78rem; text-align: center; }
.footer-bottom a { color: var(--accent-blue); }

/* ===== 悬浮按钮 ===== */
.float-actions { position: fixed; right: 22px; bottom: 28px; z-index: 80; display: flex; flex-direction: column; gap: 12px; }
.float-btn {
    width: 48px; height: 48px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(21,21,26,0.92); border: 1px solid var(--border-hover);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    color: #fff; transition: all 0.3s var(--ease);
}
.float-btn svg { width: 21px; height: 21px; }
.float-call:hover { background: var(--accent-blue); border-color: var(--accent-blue); box-shadow: 0 6px 20px rgba(10,132,255,0.45); transform: translateY(-3px); }
.float-top { opacity: 0; pointer-events: none; transform: translateY(12px); }
body.scrolled .float-top { opacity: 1; pointer-events: auto; transform: translateY(0); }
.float-top:hover { background: var(--accent-blue); border-color: var(--accent-blue); }

/* ===== 二级页：页头 / 锚点导航 ===== */
.page-hero {
    position: relative; z-index: 1;
    padding: 160px 0 54px;
    background: linear-gradient(180deg, rgba(10,132,255,0.09) 0%, transparent 100%);
}
.crumbs { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 18px; }
.crumbs a:hover { color: var(--accent-blue); }
.page-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.2vw, 2.9rem); font-weight: 700;
    letter-spacing: -0.02em; line-height: 1.18; margin-bottom: 16px;
}
.page-hero p { font-size: 1.02rem; color: var(--text-secondary); line-height: 1.8; max-width: 760px; }
.anchor-nav {
    position: relative; z-index: 2;
    background: rgba(21,21,26,0.7); backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}
.anchor-track {
    display: flex; gap: 10px; overflow-x: auto;
    padding: 14px 24px; max-width: 1280px; margin: 0 auto;
    scrollbar-width: none;
}
.anchor-track::-webkit-scrollbar { display: none; }
.anchor-track a {
    flex-shrink: 0; padding: 8px 18px; border-radius: 50px;
    border: 1px solid var(--border); font-size: 0.85rem;
    color: var(--text-secondary); transition: all 0.25s var(--ease); white-space: nowrap;
}
.anchor-track a:hover, .anchor-track a.active {
    color: #fff; background: rgba(10,132,255,0.14); border-color: rgba(10,132,255,0.5);
}

/* ===== 二级页：方案 / 案例详情区块 ===== */
.detail-section { position: relative; z-index: 1; padding: 72px 0; border-bottom: 1px solid var(--border); }
.detail-section:last-of-type { border-bottom: none; }
.detail-head { max-width: 820px; margin-bottom: 40px; }
.detail-head .fr-label { margin-bottom: 12px; display: inline-block; }
.detail-head h2 { font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.25; margin-bottom: 14px; }
.detail-head p { font-size: 0.98rem; color: var(--text-secondary); line-height: 1.85; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip-row span {
    font-size: 0.78rem; padding: 5px 14px; border-radius: 50px;
    border: 1px solid rgba(var(--theme-rgb, 10,132,255), 0.35);
    background: rgba(var(--theme-rgb, 10,132,255), 0.08);
    color: var(--theme, var(--accent-blue));
}
.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.detail-media { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.detail-media img {
    width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: center 35%;
    border-radius: 16px; border: 1px solid var(--border);
}
.detail-media img:only-child { grid-column: 1 / -1; aspect-ratio: 4 / 3; object-position: center 40%; }
.detail-prose h3 {
    font-size: 1.05rem; font-weight: 600; margin: 22px 0 10px;
    padding-left: 12px; border-left: 3px solid var(--theme, var(--accent-blue));
    line-height: 1.4;
}
.detail-prose h3:first-child { margin-top: 0; }
.detail-prose p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.85; }
.detail-prose ul { margin: 8px 0; }
.detail-prose ul li {
    position: relative; padding-left: 20px; margin-bottom: 8px;
    font-size: 0.92rem; color: var(--text-secondary); line-height: 1.75;
}
.detail-prose ul li::before {
    content: ''; position: absolute; left: 2px; top: 10px;
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--theme, var(--accent-blue));
    box-shadow: 0 0 8px rgba(var(--theme-rgb, 10,132,255), 0.8);
}
.zone-list { margin-top: 10px; }
.zone-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px dashed var(--border); }
.zone-item:last-child { border-bottom: none; }
.zone-num {
    flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display); font-weight: 700; font-size: 1rem;
    color: var(--theme, var(--accent-blue));
    background: rgba(var(--theme-rgb, 10,132,255), 0.1);
    border: 1px solid rgba(var(--theme-rgb, 10,132,255), 0.3);
}
.zone-item b { display: block; font-size: 0.95rem; font-weight: 600; margin-bottom: 3px; }
.zone-item p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.7; }
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 38px; }
.info-tile { padding: 24px 22px; border-radius: 16px; transition: all 0.3s var(--ease); }
.info-tile:hover { transform: translateY(-4px); border-color: rgba(var(--theme-rgb, 10,132,255), 0.4); }
.info-tile .tile-ico {
    width: 42px; height: 42px; border-radius: 11px; margin-bottom: 14px;
    display: flex; align-items: center; justify-content: center;
    color: var(--theme, var(--accent-blue));
    background: rgba(var(--theme-rgb, 10,132,255), 0.1);
}
.info-tile .tile-ico svg { width: 21px; height: 21px; }
.info-tile h4 { font-size: 0.98rem; font-weight: 600; margin-bottom: 6px; }
.info-tile p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.7; }
.detail-cta {
    margin-top: 42px; padding: 42px 36px; border-radius: 22px; text-align: center;
    background: linear-gradient(135deg, rgba(10,132,255,0.12), rgba(50,173,230,0.06));
    border: 1px solid rgba(10,132,255,0.25);
}
.detail-cta h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; margin-bottom: 10px; }
.detail-cta p { color: var(--text-secondary); font-size: 0.92rem; margin-bottom: 22px; }
.detail-cta .hero-actions { justify-content: center; margin-bottom: 0; }

/* 案例图集 */
.case-gallery { display: grid; grid-template-columns: 1.7fr 1fr; gap: 14px; margin-bottom: 40px; align-items: stretch; }
.case-gallery > * { min-width: 0; }
.gallery-main { border-radius: 18px; overflow: hidden; border: 1px solid var(--border); aspect-ratio: 16 / 10; }
.gallery-main img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 40%; }
.gallery-thumbs { display: grid; grid-template-rows: repeat(2, auto); gap: 14px; min-height: 0; }
.gallery-thumbs img {
    width: 100%; height: auto; aspect-ratio: 41 / 21; min-width: 0; object-fit: cover; object-position: center 30%;
    border-radius: 18px; border: 1px solid var(--border);
}
.case-gallery.single { grid-template-columns: 1fr; }
.case-gallery.single .gallery-main { aspect-ratio: 16 / 9; }
.case-meta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.case-meta-row span {
    font-size: 0.82rem; padding: 7px 16px; border-radius: 50px;
    background: rgba(255,255,255,0.04); border: 1px solid var(--border); color: var(--text-secondary);
}
.case-meta-row span b { color: var(--accent-cyan); font-weight: 600; }
.page-bottom-cta { padding: 80px 0; text-align: center; position: relative; z-index: 1; }
.page-bottom-cta .glass { max-width: 820px; margin: 0 auto; padding: 54px 36px; border-radius: 26px; }
.page-bottom-cta h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; margin-bottom: 12px; }
.page-bottom-cta p { color: var(--text-secondary); margin-bottom: 26px; }
.page-bottom-cta .hero-actions { justify-content: center; margin-bottom: 0; }

/* ===== 滚动揭示 ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.active { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }

/* ===== 响应式 ===== */
@media (max-width: 1100px) { .nav-phone { display: none; } }

@media (max-width: 1024px) {
    .topbar { display: none; }
    .navbar { top: 0; }
    .hero { padding: 128px 0 60px; min-height: auto; }
    .page-hero { padding-top: 130px; }
    .feature-row { grid-template-columns: minmax(320px, 40%) 1fr; }
    .solutions-list .feature-row:nth-child(even) { grid-template-columns: 1fr minmax(320px, 40%); }
    #services .feature-list { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 14px; }
    #services .fr-media { width: 130px; min-height: 150px; }
    #services .feature-row { min-height: 150px; }
    .fr-body { padding: clamp(24px, 3vw, 32px) clamp(20px, 3vw, 40px); }
    .about-wrap { gap: 36px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 860px) {
    .solutions-list .feature-row,
    .solutions-list .feature-row:nth-child(even) { grid-template-columns: 1fr; }
    .solutions-list .feature-row:nth-child(even) .fr-media,
    .solutions-list .feature-row:nth-child(even) .fr-body { order: initial; }
    #services .feature-list { grid-template-columns: 1fr; }
    #services .feature-row { min-height: 140px; }
    .feature-row .fr-media, .solutions-list .fr-media { min-height: 200px; }
    .detail-layout { grid-template-columns: 1fr; gap: 26px; }
    .case-gallery { grid-template-columns: 1fr; }
    .gallery-thumbs { grid-template-rows: none; grid-template-columns: 1fr 1fr; }
    .gallery-thumbs img { aspect-ratio: 16 / 10; }
}

@media (max-width: 768px) {
    .section { padding: 70px 0; }
    .nav-actions .btn-sm { display: none; }
    .hamburger { display: flex; }
    .nav-links {
        position: fixed; top: 0; right: -100%; width: 82%; max-width: 320px; height: 100vh;
        background: rgba(13,13,15,0.98); backdrop-filter: blur(24px);
        flex-direction: column; align-items: stretch; gap: 4px;
        padding: 92px 24px 32px; transition: right 0.35s var(--ease);
        border-left: 1px solid var(--border); overflow-y: auto; z-index: 1001;
    }
    .nav-links.active { right: 0; }
    .nav-link { padding: 13px 14px; font-size: 1rem; width: 100%; }
    .dropdown-trigger::after { display: none; }
    .dropdown {
        position: static; transform: none; padding-top: 0;
        opacity: 1; visibility: visible; pointer-events: auto; display: none;
    }
    .has-dropdown.open .dropdown { display: block; }
    .has-dropdown:hover .dropdown { display: none; }
    .has-dropdown.open:hover .dropdown { display: block; }
    .has-dropdown:hover .caret { transform: none; }
    .has-dropdown.open .caret, .has-dropdown.open:hover .caret { transform: rotate(180deg); }
    .dropdown-inner, .dropdown-grid { min-width: 0; width: 100%; grid-template-columns: 1fr; }
    .case-featured { grid-template-columns: 1fr; }
    .cf-media { min-height: 230px; }
    .about-wrap { grid-template-columns: 1fr; }
    .about-badge { left: 14px; }
    .contact-wrap { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr 1fr; }
    .hero { min-height: auto; }
    .hero-net { display: none; }
    .hero-sky { height: 200px; }
    .hero-scrim {
        background:
            linear-gradient(180deg, rgba(9,11,18,0.8) 0%, rgba(9,11,18,0.5) 55%, rgba(8,10,16,0.9) 100%),
            linear-gradient(90deg, rgba(8,12,24,0.85) 0%, rgba(8,12,24,0.7) 100%);
    }
    .hero-panel { padding: 22px 20px; border-radius: 20px; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 26px 20px; }
    .float-actions { right: 14px; bottom: 18px; }
    .detail-section { padding: 56px 0; }
}

@media (max-width: 480px) {
    .process-grid { grid-template-columns: 1fr; }
    .detail-media { grid-template-columns: 1fr; }
    .detail-media img, .detail-media img:only-child { aspect-ratio: 16 / 9; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .case-params { grid-template-columns: 1fr; }
    .about-tags { grid-template-columns: 1fr; }
    .hero-actions .btn { width: 100%; }
    .hero-stats { gap: 20px; }
    .stat { flex: 1; min-width: 40%; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(10,132,255,0.4); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(10,132,255,0.6); }
::selection { background: var(--accent-blue); color: #fff; }