:root {
    --brand: #0a4fb4;
    --brand-dark: #07377d;
    --brand-light: #e8f1ff;
    --accent: #00c2ff;
    --ink: #0f172a;
    --text: #334155;
    --muted: #64748b;
    --bg: #ffffff;
    --bg-soft: #f4f7fb;
    --border: #e2e8f0;
    --radius: 12px;
}

/* ============ 基础 ============ */
html { font-size: 18px; scroll-behavior: smooth; }
body {
    font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    font-size: .85rem;
    color: var(--text);
    line-height: 1.75;
    background: var(--bg);
}
h1, h2, h3, h4 { color: var(--ink); line-height: 1.35; }
img { display: block; max-width: 100%; }
[id] { scroll-margin-top: 88px; }

/* 图标统一行高，避免撑高行内元素 */
[class^="ri-"], [class*=" ri-"] { line-height: 1; }

/* 容器与栅格：统一 24px 水平槽 + 24px 行距 */
.container.grid-xl {
    max-width: 1200px;
    padding-left: 1.2rem;
    padding-right: 1.2rem;
}
.columns { margin-left: -.75rem; margin-right: -.75rem; row-gap: 1.35rem; }
.column { padding-left: .75rem; padding-right: .75rem; }

/* ============ 按钮（覆盖 Spectre 固定高度，改为弹性垂直居中） ============ */
.btn {
    height: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    padding: .62rem 1.45rem;
    font-size: .88rem;
    font-weight: 500;
    line-height: 1.4;
    border-radius: 8px;
    white-space: nowrap;
    transition: background .2s, border-color .2s, color .2s, box-shadow .2s, transform .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-brand { background: var(--brand); border: .05rem solid var(--brand); color: #fff; }
.btn-brand:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-white { background: #fff; border: .05rem solid #fff; color: var(--brand); box-shadow: 0 10px 26px rgba(7,20,45,.18); }
.btn-white:hover { background: var(--brand-light); border-color: var(--brand-light); color: var(--brand-dark); }
.btn-ghost { background: transparent; border: .05rem solid rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; color: #fff; }
.btn-block { display: flex; width: 100%; }

/* ============ 通用区块 ============ */
section.block { padding: 4.5rem 0; }
.section-title { text-align: center; max-width: 720px; margin: 0 auto 3rem; }
.section-title .eyebrow { display: block; }
.section-title h2 { margin: 0 0 .6rem; font-size: 1.85rem; }
.section-title p { margin: 0; color: var(--muted); font-size: .92rem; }
.eyebrow {
    display: inline-block;
    color: var(--brand);
    font-weight: 600;
    font-size: .78rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: .55rem;
}
.eyebrow.light { color: var(--accent); }

/* ============ 头部 ============ */
.header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .2s;
}
.header.scrolled { box-shadow: 0 4px 20px rgba(15,23,42,.07); }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: 1.5rem;
}
.logo img { height: 44px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 1.9rem; }
.nav-links a {
    color: var(--ink);
    font-size: .87rem;
    font-weight: 500;
    transition: color .2s;
    padding: .4rem 0;
}
.nav-links a:hover { color: var(--brand); }
.header-actions { display: flex; align-items: center; gap: .8rem; }
.header-actions .tel {
    display: flex;
    align-items: center;
    gap: .4rem;
    color: var(--ink);
    font-size: .9rem;
    font-weight: 600;
}
.header-actions .tel i { color: var(--brand); font-size: 1.05rem; }
.mobile-toggle {
    display: none;
    background: none;
    border: 0;
    font-size: 1.5rem;
    color: var(--ink);
    cursor: pointer;
    padding: .3rem;
    line-height: 1;
}

/* ============ Hero ============ */
.hero-section {
    position: relative;
    padding: 5.5rem 0;
    background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand) 55%, #0e5fd8 100%);
    color: #fff;
    overflow: hidden;
}
.hero-section::before,
.hero-section::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}
.hero-section::before {
    width: 520px; height: 520px;
    background: var(--accent);
    opacity: .3;
    top: -140px; right: -80px;
}
.hero-section::after {
    width: 380px; height: 380px;
    background: #7c3aed;
    opacity: .22;
    bottom: -100px; left: -80px;
}
/* 科技网格背景（大格 + 细格双层，径向遮罩渐隐，缓慢漂移） */
.hero-grid-mask {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    -webkit-mask-image: radial-gradient(ellipse 95% 100% at 55% 30%, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse 95% 100% at 55% 30%, #000 30%, transparent 75%);
}
.hero-grid-bg {
    position: absolute;
    inset: -180px;
    background-image:
    linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 180px 180px, 180px 180px, 45px 45px, 45px 45px;
    animation: grid-drift 40s linear infinite;
}
@keyframes grid-drift {
    from { transform: translate(0, 0); }
    to   { transform: translate(180px, 180px); }
}
.hero-cols { position: relative; z-index: 1; align-items: center; }
.hero-content { padding-right: 2rem; }
.hero-content h1 {
    font-size: clamp(1.9rem, 4.4vw, 2.9rem);
    color: #fff;
    margin: 0 0 1.1rem;
    line-height: 1.28;
}
.hero-content > p {
    font-size: 1rem;
    color: rgba(255,255,255,.85);
    max-width: 560px;
    margin: 0 0 1.9rem;
}
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; }
.hero-actions .btn { padding: .74rem 1.65rem; font-size: .92rem; }
.hero-stats { display: flex; gap: 3rem; flex-wrap: wrap; margin-top: 3rem; }
.hero-stats strong {
    display: block;
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, #ffffff 30%, #8ec9ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-stats span {
    display: block;
    margin-top: .55rem;
    font-size: .8rem;
    color: rgba(255,255,255,.72);
}

/* ============ Hero 行星系统（3D 倾斜轨道） ============ */
.hero-orbit {
    --tilt: 58deg;
    position: relative;
    width: 100%;
    max-width: 520px;
    aspect-ratio: 1 / 1;
    margin: 0 auto;
    container-type: inline-size;
    perspective: 1300px;
}
/* 星空背景 */
.starfield {
    position: absolute;
    inset: -12%;
    pointer-events: none;
    background-image:
    radial-gradient(1.6px 1.6px at 8% 18%, rgba(255,255,255,.95), transparent 60%),
    radial-gradient(1.2px 1.2px at 21% 62%, rgba(255,255,255,.7), transparent 60%),
    radial-gradient(1.8px 1.8px at 34% 10%, rgba(160,225,255,.9), transparent 60%),
    radial-gradient(1.2px 1.2px at 47% 78%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1.6px 1.6px at 60% 24%, rgba(255,255,255,.85), transparent 60%),
    radial-gradient(1.1px 1.1px at 73% 55%, rgba(200,235,255,.8), transparent 60%),
    radial-gradient(1.7px 1.7px at 87% 12%, rgba(255,255,255,.9), transparent 60%),
    radial-gradient(1.2px 1.2px at 93% 72%, rgba(160,225,255,.75), transparent 60%),
    radial-gradient(1.4px 1.4px at 14% 86%, rgba(255,255,255,.7), transparent 60%),
    radial-gradient(1.1px 1.1px at 68% 90%, rgba(255,255,255,.6), transparent 60%);
    animation: star-twinkle 6s ease-in-out infinite alternate;
}
@keyframes star-twinkle { from { opacity: .55; } to { opacity: 1; } }
.orbit-halo {
    position: absolute;
    inset: 16%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,194,255,.16), transparent 62%);
    pointer-events: none;
}
/* 倾斜轨道平面（椭圆视觉 + 前后景深） */
.sys {
    position: absolute;
    inset: 0;
    transform: rotateX(var(--tilt));
    transform-style: preserve-3d;
}
.orbit-path {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.orbit-path.inner { inset: 26.4%; border: 1px solid rgba(255,255,255,.12); }
.orbit-path.outer { inset: 8%; border: 1px dashed rgba(255,255,255,.22); }
/* 行星公转：内环快、外环慢 */
.planet-orbit {
    position: absolute;
    transform-style: preserve-3d;
    animation: planet-spin var(--t, 30s) linear infinite;
}
.planet-orbit.inner { inset: 26.4%; }
.planet-orbit.outer { inset: 8%; }
@keyframes planet-spin {
    from { transform: rotate(var(--a, 0deg)); }
    to   { transform: rotate(calc(var(--a, 0deg) + 360deg)); }
}
/* 行星本体：彩色球体，始终正对观者 */
.planet {
    --s: 15.5cqw;
    position: absolute;
    top: 0; left: 50%;
    width: var(--s);
    aspect-ratio: 1;
    margin-left: calc(var(--s) / -2);
    margin-top: calc(var(--s) / -2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .5cqw;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.38);
    color: #fff;
    text-align: center;
    transform: rotateZ(calc(-1 * var(--a, 0deg))) rotateX(calc(-1 * var(--tilt, 58deg)));
    animation: planet-billboard var(--t, 30s) linear infinite;
}
@keyframes planet-billboard {
    from { transform: rotateZ(calc(-1 * var(--a, 0deg))) rotateX(calc(-1 * var(--tilt, 58deg))); }
    to   { transform: rotateZ(calc(-1 * var(--a, 0deg) - 360deg)) rotateX(calc(-1 * var(--tilt, 58deg))); }
}
.planet i { font-size: 3.8cqw; color: #fff; }
.planet span { font-size: 2.4cqw; letter-spacing: .1cqw; }
/* 各行星配色（彩色光晕 + 球面明暗，告别纯深色底） */
.p-dev    { background: radial-gradient(circle at 32% 28%, #85b8ff, #1e4fa8 78%); box-shadow: 0 0 3.2cqw rgba(59,130,246,.6), inset -.6cqw -1cqw 2cqw rgba(0,0,0,.32); }
.p-wechat { background: radial-gradient(circle at 32% 28%, #7ce8a8, #15803d 78%); box-shadow: 0 0 3.2cqw rgba(74,222,128,.55), inset -.6cqw -1cqw 2cqw rgba(0,0,0,.32); }
.p-h5     { background: radial-gradient(circle at 32% 28%, #ffd166, #d97706 78%); box-shadow: 0 0 3.2cqw rgba(251,191,36,.55), inset -.6cqw -1cqw 2cqw rgba(0,0,0,.3); }
.p-web {
    --s: 17cqw;
    background: radial-gradient(circle at 32% 28%, #d6b5ff, #6d28d9 78%);
    box-shadow: 0 0 3.4cqw rgba(167,139,250,.55), inset -.6cqw -1cqw 2cqw rgba(0,0,0,.32);
}
.p-aigc {
    --s: 17.8cqw;
    background: radial-gradient(circle at 32% 28%, #74e8ff, #0e7490 78%);
    box-shadow: 0 0 3.6cqw rgba(34,211,238,.6), inset -.6cqw -1cqw 2cqw rgba(0,0,0,.3);
}
/* 恒星核心 */
.sun {
    --s: 29cqw;
    position: absolute;
    top: 50%; left: 50%;
    width: var(--s);
    aspect-ratio: 1;
    margin-left: calc(var(--s) / -2);
    margin-top: calc(var(--s) / -2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .4cqw;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,.4);
    background: radial-gradient(circle at 50% 40%, #eaf7ff 0%, #55b0ff 32%, #0b53b8 66%, #06367e 100%);
    box-shadow: 0 0 8cqw rgba(0,194,255,.38), 0 0 16cqw rgba(10,79,180,.3), inset -1cqw -1.6cqw 4cqw rgba(2,20,60,.5);
    transform: rotateX(calc(-1 * var(--tilt, 58deg)));
}
.sun i { font-size: 6.8cqw; color: #fff; text-shadow: 0 0 .9cqw rgba(255,255,255,.65); }
.sun strong { font-size: 3.8cqw; font-weight: 700; color: #fff; letter-spacing: .1cqw; }
.sun span { font-size: 2.4cqw; color: rgba(255,255,255,.82); letter-spacing: .1cqw; }
@media (prefers-reduced-motion: reduce) {
    .planet-orbit, .planet, .starfield, .hero-grid-bg { animation: none; }
}

/* ============ 核心业务（图卡） ============ */
.service-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .22s, box-shadow .22s, border-color .22s;
}
.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(10,79,180,.35);
    box-shadow: 0 16px 38px rgba(10,79,180,.1);
}
.service-pic { position: relative; flex: none; }
.service-pic img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.service-pic .icon-box {
    position: absolute;
    left: 1.25rem;
    bottom: -27px;
    width: 54px; height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--brand);
    color: #fff;
    font-size: 1.5rem;
    border: 3px solid #fff;
    box-shadow: 0 8px 20px rgba(10,79,180,.25);
}
.service-body { padding: 2.4rem 1.5rem 1.6rem; }
.service-body h3 { font-size: 1.12rem; margin: 0 0 .5rem; }
.service-body p { margin: 0; color: var(--muted); font-size: .84rem; }
/* AIGC 卡片徽章配色 */
.icon-box.icon-aigc { background: linear-gradient(135deg, #22d3ee, #0a4fb4); }
.feature-head { display: flex; align-items: center; gap: .6rem; margin-bottom: .5rem; }
.feature-head h3 { margin: 0; }
.badge-new {
    flex: none;
    background: linear-gradient(135deg, #22d3ee, #0a4fb4);
    color: #fff;
    font-size: .66rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: .16rem .55rem;
    border-radius: 999px;
}

/* ============ 行业解决方案 ============ */
.bg-soft { background: var(--bg-soft); }
.solution-item {
    height: 100%;
    display: flex;
    align-items: flex-start;
    gap: .95rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.35rem 1.5rem;
    transition: border-color .2s, box-shadow .2s;
}
.solution-item:hover { border-color: rgba(10,79,180,.4); box-shadow: 0 8px 24px rgba(10,79,180,.08); }
.solution-item > i { font-size: 1.45rem; color: var(--brand); margin-top: .2rem; }
.solution-item h4 { font-size: 1rem; margin: 0 0 .3rem; }
.solution-item p { margin: 0; color: var(--muted); font-size: .8rem; }

/* ============ 服务优势 ============ */
.why-card {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.7rem 1.2rem;
    border-radius: var(--radius);
    border: 1px solid rgba(10,79,180,.07);
    background: linear-gradient(135deg, #ffffff, #e9f0f8);
    box-shadow: 0 3px 12px rgba(10,79,180,.07);
    transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}
.why-card:hover {
    border-color: rgba(10,79,180,.16);
    box-shadow: 0 14px 32px rgba(10,79,180,.15);
    transform: translateY(-4px);
}
.why-card > i {
    font-size: 2.1rem;
    color: var(--brand);
    margin-bottom: .9rem;
}
.why-card h4 { font-size: 1rem; margin: 0 0 .4rem; }
.why-card p { margin: 0; color: var(--muted); font-size: .8rem; }

/* ============ 服务流程 ============ */
.process { position: relative; background: var(--ink); color: #fff; }
.process::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(10,79,180,.3), transparent 65%);
    pointer-events: none;
}
.process .container { position: relative; }
.process .section-title h2 { color: #fff; }
.process .section-title p { color: rgba(255,255,255,.62); }
.step-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    position: relative;
}
.step-list::before {
    content: "";
    position: absolute;
    top: 53px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(34,211,238,.45) 16%, rgba(10,79,180,.45) 84%, transparent);
}
.step-list::after {
    content: "";
    position: absolute;
    top: 52px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #22d3ee, transparent);
    box-shadow: 0 0 12px rgba(34,211,238,.75);
    animation: step-flow 5.5s linear infinite;
}
@keyframes step-flow {
    0% { left: -80px; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}
.step-item {
    position: relative; z-index: 1;
    display: flex; flex-direction: column; align-items: center; gap: .9rem;
    padding: 1.5rem 1rem 1.35rem;
    border-radius: 16px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.09);
    backdrop-filter: blur(4px);
    text-align: center;
    transition: transform .3s ease, border-color .3s ease, background .3s ease, box-shadow .3s ease;
}
.step-item:hover {
    transform: translateY(-6px);
    background: rgba(255,255,255,.08);
    border-color: rgba(34,211,238,.45);
    box-shadow: 0 14px 34px rgba(0,0,0,.35), 0 0 26px rgba(34,211,238,.14);
}
.step-node {
    position: relative;
    width: 60px; height: 60px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #22d3ee, #0a4fb4);
    color: #fff; font-size: 1.55rem;
    box-shadow: 0 0 0 6px rgba(10,79,180,.18), 0 10px 24px rgba(10,79,180,.4);
    transition: transform .3s ease, box-shadow .3s ease;
}
.step-item:hover .step-node {
    transform: scale(1.08);
    box-shadow: 0 0 0 8px rgba(34,211,238,.16), 0 12px 28px rgba(34,211,238,.35);
}
.step-num {
    position: absolute;
    top: -5px; right: -5px;
    width: 20px; height: 20px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: #fff;
    color: var(--brand);
    font-size: .68rem;
    font-weight: 700;
    border: 2px solid var(--ink);
    box-shadow: 0 2px 6px rgba(0,0,0,.35);
}
.step-item h4 { font-size: .95rem; color: #fff; margin: 0 0 .3rem; }
.step-item p { margin: 0; font-size: .74rem; color: rgba(255,255,255,.58); }

/* ============ 客户墙 ============ */
.client-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .8rem;
    max-width: 900px;
    margin: 0 auto;
}
.client-tag {
    display: inline-flex;
    align-items: center;
    padding: .52rem 1.25rem;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: .85rem;
    color: var(--text);
    transition: background .2s, color .2s, border-color .2s;
}
.client-tag:hover {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}

/* ============ 关于我们（图片 + 悬浮数据牌） ============ */
.about-grid { align-items: center; }
.about-text h2 { font-size: 1.85rem; margin: 0 0 1.1rem; }
.about-text p { color: var(--muted); margin: 0 0 .9rem; }
.about-list {
    list-style: none;
    margin: 1.3rem 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: .65rem;
}
.about-list li {
    display: flex;
    align-items: center;
    gap: .55rem;
    color: var(--ink);
    font-size: .9rem;
    font-weight: 500;
}
.about-list li i { color: var(--brand); font-size: 1.1rem; }
.about-media {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(10,79,180,.14);
}
.about-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.about-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(7,55,125,.5), transparent 42%);
    pointer-events: none;
}
.about-badge {
    position: absolute;
    left: 1.25rem;
    bottom: 1.25rem;
    z-index: 1;
    padding: .85rem 1.15rem;
    border-radius: 12px;
    background: rgba(255,255,255,.94);
    box-shadow: 0 10px 26px rgba(7,20,45,.18);
}
.about-badge strong { display: block; font-size: 1.25rem; line-height: 1.15; color: var(--brand); }
.about-badge span { font-size: .72rem; color: var(--muted); }

/* ============ 联系我们 ============ */
.contact-grid { align-items: stretch; }
.contact-card {
    position: relative;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--brand-dark);
    border-radius: 16px;
    padding: 2.3rem 2.2rem;
    color: #fff;
}
.contact-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at 85% 10%, rgba(0,194,255,.16), transparent 55%);
    pointer-events: none;
}
.contact-card > * { position: relative; }
.contact-card h2 { color: #fff; font-size: 1.6rem; margin: 0 0 .7rem; }
.contact-card > p { color: rgba(255,255,255,.78); margin: 0 0 1.8rem; font-size: .88rem; }
.contact-info { display: flex; flex-direction: column; gap: 1.15rem; }
.contact-info .item { display: flex; align-items: center; gap: .85rem; }
.contact-info .item > i {
    flex: none;
    width: 42px; height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255,255,255,.1);
    color: var(--accent);
    font-size: 1.15rem;
}
.contact-info .item strong { display: block; font-size: .85rem; color: #fff; line-height: 1.4; }
.contact-info .item span { font-size: .8rem; color: rgba(255,255,255,.72); }
.contact-form-card {
    height: 100%;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.3rem 2.2rem;
}
.contact-form-card h3 { font-size: 1.25rem; margin: 0 0 .35rem; }
.contact-form-card > p { color: var(--muted); font-size: .85rem; margin: 0 0 1.5rem; }
.contact-form .form-group { margin-bottom: 1.05rem; }
.contact-form .form-label {
    padding: 0 0 .4rem;
    font-size: .84rem;
    font-weight: 500;
    color: var(--ink);
}
.contact-form .form-input,
.contact-form .form-select {
    height: auto;
    padding: .58rem .85rem;
    font-size: .87rem;
    border-radius: 8px;
    border-color: var(--border);
}
.contact-form .form-input:focus,
.contact-form .form-select:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 .1rem rgba(10,79,180,.14);
}
.contact-form textarea.form-input { resize: vertical; }

/* ============ 页脚 ============ */
.site-footer {
    background: #0b1220;
    color: rgba(255,255,255,.55);
    padding: 3rem 0 0;
    font-size: .8rem;
}
.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding-bottom: 2.2rem;
}
.footer-brand img { height: 38px; margin-bottom: .8rem; }
.footer-brand p { max-width: 400px; margin: 0; line-height: 1.7; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-links a { color: rgba(255,255,255,.68); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem;
    padding: 1.2rem 0;
    border-top: 1px solid rgba(255,255,255,.08);
}
.footer-bottom a { color: rgba(255,255,255,.68); }
.footer-bottom a:hover { color: #fff; }

/* ============ 滚动浮现（由 JS 挂载，无 JS / 减动效时正常显示） ============ */
.reveal { opacity: 0; }
.reveal.in { opacity: 1; animation: fade-up .55s ease backwards; }
@keyframes fade-up {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: none; }
}

/* ============ 响应式（对齐 Spectre md 断点 840px） ============ */
@media (max-width: 840px) {
    .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    padding: .5rem 1.2rem 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 28px rgba(0,0,0,.07);
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: .75rem 0; border-bottom: 1px solid var(--bg-soft); }
    .nav-links a:last-child { border-bottom: 0; }
    .mobile-toggle { display: block; }
    .hero-content { padding-right: 0; }
    .step-list { grid-template-columns: 1fr; gap: .9rem; }
    .step-list::before, .step-list::after { display: none; }
    .step-item { flex-direction: row; text-align: left; padding: 1.05rem 1.15rem; }
    .step-node { flex: none; }
}
@media (max-width: 600px) {
    .header-actions .tel { display: none; }
    .hero-stats { gap: 1.8rem; }
    .contact-card, .contact-form-card { padding: 1.8rem 1.5rem; }
}