/* =========================================================
   近相安科技官网 · 深空蓝 × 电光青
   纯原生 CSS，无外部依赖
   ========================================================= */

:root {
    --bg-0: #05101f;
    --bg-1: #081729;
    --bg-2: #0a1b33;
    --bg-3: #0f2547;

    --ink: #f2f6ff;
    --ink-2: #c8d5e8;
    --muted: #a9b8d0;
    --muted-2: #6f83a3;

    --blue: #2f7bff;
    --blue-deep: #1b4dff;
    --cyan: #43d9ff;
    --green: #22c55e;
    --orange: #f59e0b;
    --red: #ef4444;

    --line: rgba(120, 180, 255, .14);
    --line-strong: rgba(120, 180, 255, .28);
    --glass: linear-gradient(150deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .018));
    --glass-strong: linear-gradient(150deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .03));

    --radius-sm: 12px;
    --radius: 20px;
    --radius-lg: 28px;

    --container: 1200px;
    --header-height: 82px;

    --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --ease: cubic-bezier(.22, 1, .36, 1);
    --shadow-lg: 0 30px 80px rgba(1, 8, 20, .55);
    --shadow-cyan: 0 18px 50px rgba(47, 123, 255, .28);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    background: var(--bg-0);
    color: var(--ink);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.lightbox-open {
    overflow: hidden;
}

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd,
ul {
    margin: 0;
}

ul {
    padding: 0;
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button,
input,
textarea,
select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

::selection {
    background: rgba(67, 217, 255, .28);
    color: #fff;
}

:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
    border-radius: 6px;
}

.container {
    width: min(var(--container), calc(100% - 48px));
    margin-inline: auto;
}

.icon {
    width: 1.15em;
    height: 1.15em;
    flex: none;
    fill: none;
}

.svg-sprite {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 300;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--cyan);
    color: #04101f;
    font-weight: 700;
    transform: translateY(-160%);
    transition: transform .25s var(--ease);
}

.skip-link:focus {
    transform: translateY(0);
}

/* ---------- 背景氛围 ---------- */

.site-atmosphere {
    position: fixed;
    inset: 0;
    z-index: -2;
    overflow: hidden;
    background:
        radial-gradient(1200px 620px at 82% -12%, rgba(47, 123, 255, .18), transparent 62%),
        radial-gradient(900px 520px at -8% 22%, rgba(67, 217, 255, .1), transparent 60%),
        linear-gradient(180deg, #05101f 0%, #071528 42%, #05101f 100%);
}

.site-atmosphere__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 180, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 180, 255, .045) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 72%);
    mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 72%);
}

.site-atmosphere__glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: .55;
    animation: breathe 14s ease-in-out infinite alternate;
}

.site-atmosphere__glow--one {
    top: 8%;
    right: 4%;
    width: 420px;
    height: 420px;
    background: rgba(27, 77, 255, .28);
}

.site-atmosphere__glow--two {
    top: 46%;
    left: -6%;
    width: 360px;
    height: 360px;
    background: rgba(67, 217, 255, .12);
    animation-delay: -6s;
}

.site-atmosphere__beam {
    position: absolute;
    top: -20%;
    left: 42%;
    width: 1px;
    height: 70%;
    background: linear-gradient(180deg, transparent, rgba(67, 217, 255, .22), transparent);
    box-shadow: 0 0 120px 30px rgba(47, 123, 255, .12);
    transform: rotate(18deg);
}

@keyframes breathe {
    from {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: .42;
    }
    to {
        transform: translate3d(-24px, 26px, 0) scale(1.08);
        opacity: .65;
    }
}

/* ---------- 顶部进度条 ---------- */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), var(--blue), #9cc4ff);
    box-shadow: 0 0 16px rgba(67, 217, 255, .7);
    transition: width .12s linear;
}

/* ---------- 头部 ---------- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    transition: padding .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease);
    border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
    padding: 12px 0;
    background: rgba(5, 16, 31, .72);
    border-bottom-color: var(--line);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex: none;
}

.brand__mark {
    width: 42px;
    height: 42px;
    filter: drop-shadow(0 6px 18px rgba(67, 217, 255, .25));
}

.brand__copy {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-size: 19px;
    letter-spacing: .04em;
}

.brand__copy strong {
    font-weight: 700;
}

.brand__copy em {
    font-style: normal;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .24em;
    color: var(--cyan);
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    font-size: 14.5px;
    color: var(--muted);
}

.primary-nav a {
    position: relative;
    padding: 6px 0;
    transition: color .25s var(--ease);
}

.primary-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s var(--ease);
}

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

.primary-nav a:hover::after,
.primary-nav a.is-active::after {
    transform: scaleX(1);
}

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

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, .03);
    color: var(--ink);
}

.menu-toggle .icon {
    width: 22px;
    height: 22px;
}

.menu-toggle__close {
    display: none;
}

.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 16px;
    right: 16px;
    z-index: 99;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(6, 18, 34, .96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}

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

.mobile-menu nav {
    display: grid;
    gap: 2px;
    margin-bottom: 14px;
}

.mobile-menu nav a {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 10px;
    border-radius: 10px;
    color: var(--ink-2);
    font-size: 16px;
}

.mobile-menu nav a span {
    font-size: 11px;
    letter-spacing: .14em;
    color: var(--muted-2);
}

.mobile-menu nav a:hover {
    background: rgba(255, 255, 255, .04);
    color: var(--ink);
}

/* ---------- 按钮 ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 50px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .01em;
    white-space: nowrap;
    transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}

.btn .icon {
    transition: transform .3s var(--ease);
}

.btn:hover .icon {
    transform: translateX(3px);
}

.btn--primary {
    background: linear-gradient(100deg, var(--cyan), var(--blue) 58%, var(--blue-deep));
    color: #04101f;
    box-shadow: 0 14px 34px rgba(47, 123, 255, .28);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 44px rgba(47, 123, 255, .42);
}

.btn--ghost {
    border-color: var(--line-strong);
    background: rgba(255, 255, 255, .025);
    color: var(--ink);
}

.btn--ghost:hover {
    border-color: rgba(67, 217, 255, .5);
    background: rgba(67, 217, 255, .07);
    transform: translateY(-2px);
}

.btn--sm {
    min-height: 42px;
    padding: 0 18px;
    font-size: 14px;
}

.btn--block {
    width: 100%;
}

/* ---------- 通用文本 ---------- */

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    color: var(--cyan);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .18em;
    text-transform: uppercase;
}

.eyebrow__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 14px rgba(67, 217, 255, .9);
}

.text-gradient {
    background: linear-gradient(100deg, #7fe8ff 0%, var(--cyan) 26%, var(--blue) 68%, #9cc4ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--cyan);
    font-size: 14px;
    font-weight: 600;
}

.link-arrow .icon {
    transition: transform .3s var(--ease);
}

.link-arrow:hover .icon {
    transform: translate(3px, -3px);
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    padding: 168px 0 104px;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: min(1200px, 92%);
    height: 1px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.hero__inner {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    align-items: center;
    gap: 64px;
}

.hero__title {
    margin-bottom: 24px;
    font-size: clamp(42px, 5.6vw, 72px);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -.035em;
}

.hero__lead {
    max-width: 560px;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.9;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.hero__meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    max-width: 520px;
    margin-top: 48px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric strong {
    font-size: 30px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -.02em;
}

.metric strong span {
    color: var(--cyan);
}

.metric > span {
    color: var(--muted-2);
    font-size: 12px;
    letter-spacing: .08em;
}

.hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 32px;
}

.hero__tags span {
    padding: 5px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, .025);
    color: var(--muted-2);
    font-size: 12px;
}

.hero__visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 540px;
}

.hero__ring {
    position: absolute;
    width: 480px;
    height: 480px;
    border: 1px dashed rgba(120, 180, 255, .18);
    border-radius: 50%;
    animation: spin 36s linear infinite;
}

.hero__ring::before,
.hero__ring::after {
    content: "";
    position: absolute;
    border-radius: 50%;
}

.hero__ring::before {
    inset: 58px;
    border: 1px solid rgba(67, 217, 255, .12);
}

.hero__ring::after {
    top: 36px;
    left: 50%;
    width: 8px;
    height: 8px;
    margin-left: -4px;
    background: var(--cyan);
    box-shadow: 0 0 18px rgba(67, 217, 255, .9);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.delivery-card {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 440px;
    padding: 24px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(120% 100% at 100% 0%, rgba(67, 217, 255, .1), transparent 55%),
        linear-gradient(160deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    transform: rotate(-1.2deg);
}

.delivery-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 22px;
}

.delivery-dots {
    display: flex;
    gap: 6px;
}

.delivery-dots i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .18);
}

.delivery-dots i:first-child {
    background: var(--cyan);
}

.delivery-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border: 1px solid rgba(34, 197, 94, .28);
    border-radius: 999px;
    background: rgba(34, 197, 94, .1);
    color: #74e39a;
    font-size: 11px;
    letter-spacing: .08em;
}

.delivery-pill::before {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 10px rgba(34, 197, 94, .8);
}

.delivery-title {
    margin-bottom: 4px;
    font-size: 19px;
    font-weight: 600;
}

.delivery-sub {
    margin-bottom: 22px;
    color: var(--muted-2);
    font-size: 12.5px;
}

.delivery-steps {
    display: grid;
    gap: 16px;
}

.delivery-step {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
}

.delivery-step__node {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--line-strong);
    border-radius: 9px;
    color: var(--muted-2);
    font-size: 11px;
    font-weight: 700;
}

.delivery-step__body {
    min-width: 0;
}

.delivery-step__label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    color: var(--ink-2);
    font-size: 12.5px;
}

.delivery-step__label em {
    font-style: normal;
    color: var(--muted-2);
    font-size: 11px;
}

.delivery-step__bar {
    height: 4px;
    border-radius: 99px;
    background: rgba(255, 255, 255, .06);
    overflow: hidden;
}

.delivery-step__bar i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--cyan), var(--blue));
}

.delivery-step--done .delivery-step__node {
    border-color: rgba(67, 217, 255, .35);
    background: rgba(67, 217, 255, .1);
    color: var(--cyan);
}

.delivery-step--active .delivery-step__node {
    border-color: rgba(47, 123, 255, .6);
    background: linear-gradient(140deg, var(--cyan), var(--blue));
    color: #04101f;
    box-shadow: 0 0 22px rgba(47, 123, 255, .5);
}

.delivery-step--active .delivery-step__label {
    color: var(--ink);
}

.delivery-step__status {
    color: var(--muted-2);
    font-size: 11px;
}

.delivery-step--done .delivery-step__status {
    color: var(--cyan);
}

.delivery-step--active .delivery-step__status {
    color: #9cc4ff;
}

.delivery-card__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    color: var(--muted-2);
    font-size: 11.5px;
}

.delivery-card__foot b {
    color: var(--ink-2);
    font-weight: 600;
}

.float-card {
    position: absolute;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: rgba(7, 22, 41, .82);
    box-shadow: 0 18px 44px rgba(1, 8, 20, .5);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    animation: floaty 7s ease-in-out infinite;
}

.float-card .float-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: rgba(67, 217, 255, .1);
    color: var(--cyan);
}

.float-card .icon {
    width: 18px;
    height: 18px;
}

.float-card strong {
    display: block;
    font-size: 13px;
    font-weight: 600;
}

.float-card span {
    display: block;
    color: var(--muted-2);
    font-size: 10.5px;
}

.float-card--one {
    top: 8%;
    right: -2%;
}

.float-card--two {
    bottom: 9%;
    left: -4%;
    animation-delay: -3.5s;
}

@keyframes floaty {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* ---------- 区块通用 ---------- */

.section {
    position: relative;
    padding: clamp(76px, 9vw, 120px) 0;
}

section[id] {
    scroll-margin-top: calc(var(--header-height) + 16px);
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 48px;
}

.section-head__left {
    max-width: 660px;
}

.section-head h2 {
    font-size: clamp(30px, 3.8vw, 46px);
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -.03em;
}

.section-head__lead {
    max-width: 420px;
    padding-bottom: 6px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.85;
}

.section-head--center {
    display: block;
    max-width: 760px;
    margin: 0 auto 52px;
    text-align: center;
}

.section-head--center .section-head__lead {
    max-width: 620px;
    margin: 18px auto 0;
    padding-bottom: 0;
}

.section-head--center .eyebrow {
    justify-content: center;
}

/* ---------- 定制的好处 ---------- */

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.benefit-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 238px;
    padding: 28px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--glass);
    transition: transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
}

.benefit-card::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -30%;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(47, 123, 255, .18), transparent 68%);
    opacity: 0;
    transition: opacity .5s var(--ease);
}

.benefit-card:hover {
    transform: translateY(-6px);
    border-color: var(--line-strong);
    background: var(--glass-strong);
}

.benefit-card:hover::before {
    opacity: 1;
}

.benefit-card__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 22px;
}

.benefit-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(67, 217, 255, .22);
    border-radius: 13px;
    background: linear-gradient(145deg, rgba(67, 217, 255, .14), rgba(47, 123, 255, .06));
    color: var(--cyan);
}

.benefit-icon .icon {
    width: 22px;
    height: 22px;
}

.benefit-index {
    color: rgba(169, 184, 208, .28);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .16em;
}

.benefit-card h3 {
    margin-bottom: 10px;
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -.01em;
}

.benefit-card p {
    color: var(--muted-2);
    font-size: 14px;
    line-height: 1.85;
}

.benefit-card__line {
    position: absolute;
    left: 28px;
    right: 28px;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--blue), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .5s var(--ease);
}

.benefit-card:hover .benefit-card__line {
    transform: scaleX(1);
}

/* ---------- 解决方案 ---------- */

.section--solutions {
    background: linear-gradient(180deg, rgba(10, 27, 51, .35), rgba(5, 16, 31, .1));
    border-top: 1px solid rgba(120, 180, 255, .07);
    border-bottom: 1px solid rgba(120, 180, 255, .07);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.solution-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 268px;
    padding: 30px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(9, 24, 45, .55);
    transition: transform .45s var(--ease), border-color .45s var(--ease), box-shadow .45s var(--ease);
}

.solution-card::after {
    content: "";
    position: absolute;
    right: -60px;
    bottom: -80px;
    width: 200px;
    height: 200px;
    border: 1px solid rgba(120, 180, 255, .12);
    border-radius: 50%;
    transition: transform .6s var(--ease), border-color .6s var(--ease);
}

.solution-card:hover {
    transform: translateY(-6px);
    border-color: rgba(67, 217, 255, .3);
    box-shadow: 0 24px 60px rgba(1, 8, 20, .45);
}

.solution-card:hover::after {
    transform: scale(1.14);
    border-color: rgba(67, 217, 255, .25);
}

.solution-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 22px;
    border: 1px solid rgba(47, 123, 255, .28);
    border-radius: 15px;
    background: linear-gradient(145deg, rgba(47, 123, 255, .18), rgba(67, 217, 255, .05));
    color: #8fd8ff;
}

.solution-card__icon .icon {
    width: 25px;
    height: 25px;
}

.solution-card h3 {
    margin-bottom: 10px;
    font-size: 20px;
    font-weight: 600;
}

.solution-card p {
    color: var(--muted-2);
    font-size: 14px;
    line-height: 1.8;
}

.solution-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
    padding-top: 22px;
}

.solution-card__tags span {
    padding: 4px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted-2);
    font-size: 11px;
}

/* ---------- 服务流程 ---------- */

.process {
    position: relative;
    padding-top: 8px;
}

.process__line {
    position: absolute;
    top: 34px;
    left: 6%;
    right: 6%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(67, 217, 255, .5), rgba(47, 123, 255, .55), transparent);
}

.process__line::before {
    content: "";
    position: absolute;
    top: -2px;
    left: 0;
    width: 90px;
    height: 5px;
    border-radius: 99px;
    background: linear-gradient(90deg, transparent, var(--cyan));
    filter: blur(1px);
    animation: flow 6s linear infinite;
}

@keyframes flow {
    from {
        left: 0;
        opacity: 0;
    }
    20% {
        opacity: 1;
    }
    80% {
        opacity: 1;
    }
    to {
        left: calc(100% - 90px);
        opacity: 0;
    }
}

.process__steps {
    position: relative;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
}

.process-step {
    position: relative;
    padding: 0 6px;
}

.process-step__num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 22px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    background: rgba(7, 22, 41, .9);
    color: var(--cyan);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .08em;
    transition: border-color .4s var(--ease), box-shadow .4s var(--ease), transform .4s var(--ease);
}

.process-step:hover .process-step__num {
    transform: translateY(-4px);
    border-color: rgba(67, 217, 255, .55);
    box-shadow: 0 0 26px rgba(47, 123, 255, .3);
}

.process-step h3 {
    margin-bottom: 8px;
    font-size: 17px;
    font-weight: 600;
}

.process-step p {
    color: var(--muted-2);
    font-size: 13px;
    line-height: 1.75;
}

/* ---------- 案例 ---------- */

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.case-card {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--glass);
    transition: transform .45s var(--ease), border-color .45s var(--ease), box-shadow .45s var(--ease);
}

.case-card:hover {
    transform: translateY(-6px);
    border-color: rgba(67, 217, 255, .28);
    box-shadow: 0 26px 60px rgba(1, 8, 20, .5);
}

.case-card__media {
    position: relative;
    display: block;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-2);
}

.case-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .7s var(--ease);
}

.case-card:hover .case-card__media img {
    transform: scale(1.05);
}

.case-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(120% 120% at 15% 10%, rgba(67, 217, 255, .28), transparent 52%),
        radial-gradient(100% 100% at 85% 90%, rgba(27, 77, 255, .38), transparent 55%),
        linear-gradient(145deg, #0a1b33, #0f2547);
}

.case-placeholder::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 180, 255, .08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 180, 255, .08) 1px, transparent 1px);
    background-size: 36px 36px;
    -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 78%);
    mask-image: radial-gradient(circle at 50% 50%, #000, transparent 78%);
}

.case-placeholder span {
    position: relative;
    z-index: 1;
    color: rgba(255, 255, 255, .9);
    font-size: 54px;
    font-weight: 700;
    letter-spacing: -.04em;
    text-shadow: 0 10px 40px rgba(47, 123, 255, .5);
}

.case-card__industry {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    padding: 5px 11px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 999px;
    background: rgba(4, 14, 27, .6);
    color: #dbe9ff;
    font-size: 11px;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.case-card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 20px 20px 18px;
}

.case-card__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 22px;
    margin-bottom: 10px;
    color: var(--muted-2);
    font-size: 12px;
}

.case-card__logo {
    max-width: 92px;
    max-height: 22px;
    object-fit: contain;
    filter: brightness(1.12);
}

.case-card h3 {
    margin-bottom: 8px;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    letter-spacing: -.01em;
}

.case-card h3 a {
    transition: color .25s var(--ease);
}

/* 整张卡片可点击：标题链接铺满卡片 */
.case-card h3 a::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
}

.case-card:hover h3 a {
    color: #a9e9ff;
}

.case-card p {
    display: -webkit-box;
    overflow: hidden;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    color: var(--muted-2);
    font-size: 13.5px;
    line-height: 1.75;
}

.case-card__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    padding-top: 18px;
}

.case-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.case-card__tags span {
    padding: 3px 8px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted-2);
    font-size: 10.5px;
}

.case-card__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    flex: none;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--cyan);
    transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}

.case-card:hover .case-card__arrow {
    border-color: rgba(67, 217, 255, .4);
    background: rgba(67, 217, 255, .1);
    transform: rotate(45deg);
}

.case-card__arrow .icon {
    width: 15px;
    height: 15px;
}

.cases-empty {
    padding: 60px 20px;
    border: 1px dashed var(--line-strong);
    border-radius: var(--radius);
    color: var(--muted-2);
    text-align: center;
}

/* ---------- 免费咨询 ---------- */

.section--contact {
    padding-bottom: clamp(90px, 10vw, 140px);
}

.contact {
    display: grid;
    grid-template-columns: .92fr 1.08fr;
    align-items: start;
    gap: 56px;
}

.contact__copy h2 {
    margin-bottom: 18px;
    font-size: clamp(30px, 3.8vw, 46px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -.03em;
}

.contact__copy > p {
    max-width: 460px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.9;
}

.contact-points {
    display: grid;
    gap: 14px;
    margin: 28px 0 32px;
}

.contact-points li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--ink-2);
    font-size: 14px;
}

.contact-points .icon {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    color: var(--cyan);
}

.contact-channels {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 28px;
    padding-top: 26px;
    border-top: 1px solid var(--line);
}

.contact-channel {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 14px;
}

.contact-channel .icon {
    width: 18px;
    height: 18px;
    color: var(--cyan);
}

.contact-channel strong {
    display: block;
    color: var(--ink);
    font-size: 15px;
    font-weight: 600;
}

.contact-channel span {
    display: block;
    color: var(--muted-2);
    font-size: 11px;
    letter-spacing: .08em;
}

.contact-form-wrap {
    position: relative;
    padding: 32px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(120% 100% at 100% 0%, rgba(67, 217, 255, .08), transparent 55%),
        rgba(8, 23, 41, .72);
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.contact-form-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(140deg, rgba(67, 217, 255, .35), transparent 35%, transparent 70%, rgba(47, 123, 255, .25));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.contact-form__head {
    margin-bottom: 22px;
}

.contact-form__head h3 {
    margin-bottom: 6px;
    font-size: 21px;
    font-weight: 600;
}

.contact-form__head p {
    color: var(--muted-2);
    font-size: 13px;
}

.contact-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.contact-form[hidden] {
    display: none;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-field--full {
    grid-column: 1 / -1;
}

.form-field label {
    color: var(--ink-2);
    font-size: 12.5px;
    font-weight: 500;
}

.form-field label i {
    margin-left: 2px;
    color: var(--cyan);
    font-style: normal;
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(4, 14, 27, .55);
    color: var(--ink);
    transition: border-color .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}

.form-field input {
    height: 48px;
}

.form-field textarea {
    min-height: 112px;
    padding: 12px 14px;
    resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
    color: #5c6e8a;
}

.form-field input:focus,
.form-field textarea:focus {
    outline: none;
    border-color: rgba(67, 217, 255, .55);
    background: rgba(4, 14, 27, .78);
    box-shadow: 0 0 0 3px rgba(67, 217, 255, .1);
}

.form-field.is-error input,
.form-field.is-error textarea {
    border-color: rgba(239, 68, 68, .65);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, .1);
}

.field-error {
    display: none;
    color: #ff8f8f;
    font-size: 11.5px;
}

.form-field.is-error .field-error {
    display: block;
}

.hp-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.contact-form__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 20px;
}

.contact-form__foot p {
    color: var(--muted-2);
    font-size: 11.5px;
    line-height: 1.6;
}

.contact-form__foot .btn {
    flex: none;
}

.contact-form__submit[disabled] {
    opacity: .65;
    cursor: not-allowed;
    transform: none;
}

.form-success {
    display: none;
    padding: 26px 10px;
    text-align: center;
}

.form-success.is-visible {
    display: block;
    animation: fadeUp .5s var(--ease);
}

.success-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 62px;
    height: 62px;
    margin: 0 auto 18px;
    border: 1px solid rgba(34, 197, 94, .35);
    border-radius: 50%;
    background: rgba(34, 197, 94, .1);
    color: var(--green);
    animation: pop .5s var(--ease);
}

.success-mark .icon {
    width: 30px;
    height: 30px;
}

.form-success h3 {
    margin-bottom: 8px;
    font-size: 21px;
    font-weight: 600;
}

.form-success p {
    margin-bottom: 20px;
    color: var(--muted);
    font-size: 13.5px;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pop {
    0% {
        transform: scale(.7);
    }
    60% {
        transform: scale(1.06);
    }
    100% {
        transform: scale(1);
    }
}

/* ---------- 页脚 ---------- */

.site-footer {
    position: relative;
    padding: 64px 0 26px;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(5, 16, 31, .2), rgba(3, 10, 21, .8));
}

.site-footer__top {
    display: grid;
    grid-template-columns: 1.45fr .55fr .75fr 1fr;
    gap: 44px;
    padding-bottom: 44px;
}

.brand--footer {
    margin-bottom: 16px;
}

.site-footer__brand p {
    max-width: 290px;
    color: var(--muted-2);
    font-size: 13.5px;
    line-height: 1.8;
}

.site-footer__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 18px;
}

.site-footer__badges span {
    padding: 4px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted-2);
    font-size: 10.5px;
}

.site-footer__col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.site-footer__col h3 {
    margin-bottom: 6px;
    color: var(--ink-2);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.site-footer__col a,
.site-footer__col > span {
    color: var(--muted-2);
    font-size: 13px;
    transition: color .25s var(--ease);
}

.site-footer__col a:hover {
    color: var(--cyan);
}

.site-footer__contact a,
.site-footer__contact > span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-footer__contact .icon {
    width: 15px;
    height: 15px;
    color: var(--cyan);
}

.site-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
    color: var(--muted-2);
    font-size: 12px;
}

/* ---------- 回到顶部 ---------- */

.back-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    background: rgba(7, 22, 41, .8);
    color: var(--cyan);
    box-shadow: 0 14px 34px rgba(1, 8, 20, .45);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}

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

.back-top .icon {
    width: 19px;
    height: 19px;
    transform: rotate(-90deg);
}

/* ---------- 页面 Hero（案例列表 / 详情） ---------- */

.page-hero {
    position: relative;
    padding: 156px 0 56px;
    overflow: hidden;
}

.page-hero::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: min(1200px, 92%);
    height: 1px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
    color: var(--muted-2);
    font-size: 12.5px;
}

.breadcrumb a {
    color: var(--muted);
    transition: color .25s var(--ease);
}

.breadcrumb a:hover {
    color: var(--cyan);
}

.breadcrumb span {
    color: rgba(120, 140, 170, .5);
}

.page-hero h1 {
    max-width: 900px;
    margin-bottom: 16px;
    font-size: clamp(38px, 5vw, 62px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -.035em;
}

.page-hero__lead {
    max-width: 620px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.9;
}

/* ---------- 案例列表 ---------- */

.section--case-list {
    padding-top: 44px;
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-bottom: 34px;
}

.filter-chip {
    padding: 8px 17px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, .025);
    color: var(--muted);
    font-size: 13px;
    transition: color .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}

.filter-chip:hover {
    color: var(--ink);
    border-color: var(--line-strong);
    transform: translateY(-1px);
}

.filter-chip.is-active {
    border-color: transparent;
    background: linear-gradient(100deg, rgba(67, 217, 255, .9), rgba(47, 123, 255, .95));
    color: #04101f;
    font-weight: 600;
}

.case-grid--list {
    row-gap: 24px;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 44px;
}

.pagination__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 42px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 11px;
    background: rgba(255, 255, 255, .02);
    color: var(--muted);
    font-size: 13px;
    transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

a.pagination__item:hover {
    color: var(--ink);
    border-color: var(--line-strong);
    background: rgba(255, 255, 255, .05);
}

.pagination__item.is-active {
    border-color: transparent;
    background: linear-gradient(100deg, var(--cyan), var(--blue));
    color: #04101f;
    font-weight: 600;
}

.pagination__item.is-disabled {
    opacity: .35;
    pointer-events: none;
}

.pagination__ellipsis {
    padding: 0 4px;
    color: var(--muted-2);
    font-size: 13px;
}

.cta-band {
    padding-top: 0;
}

.cta-band__inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 42px 46px;
    overflow: hidden;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background:
        radial-gradient(90% 140% at 100% 0%, rgba(67, 217, 255, .16), transparent 55%),
        linear-gradient(145deg, rgba(47, 123, 255, .14), rgba(8, 23, 41, .75));
}

.cta-band__inner::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -120px;
    width: 320px;
    height: 320px;
    border: 1px solid rgba(67, 217, 255, .16);
    border-radius: 50%;
}

.cta-band h2 {
    margin-bottom: 6px;
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 700;
    letter-spacing: -.02em;
}

.cta-band p {
    color: var(--muted);
    font-size: 14px;
}

/* ---------- 案例详情 ---------- */

.case-hero {
    padding: 150px 0 30px;
}

.case-hero__grid {
    display: grid;
    grid-template-columns: 1.02fr .98fr;
    align-items: center;
    gap: 56px;
}

.case-hero h1 {
    margin-bottom: 18px;
    font-size: clamp(34px, 4.4vw, 56px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -.035em;
}

.case-hero__summary {
    max-width: 560px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.9;
}

.case-hero__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 22px 30px;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}

.case-hero__meta > div {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.case-hero__meta span {
    color: var(--muted-2);
    font-size: 10.5px;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.case-hero__meta strong {
    font-size: 15px;
    font-weight: 600;
}

.case-logo-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 92px;
    height: 44px;
    padding: 6px 10px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, .03);
}

.case-logo-box img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.case-hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 20px;
}

.case-hero__tags span {
    padding: 5px 11px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted-2);
    font-size: 11.5px;
}

.case-hero__media {
    position: relative;
    aspect-ratio: 16 / 11;
    overflow: hidden;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background: var(--bg-2);
    box-shadow: var(--shadow-lg);
}

.case-hero__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-hero__media .case-placeholder span {
    font-size: 72px;
}

.case-detail {
    padding-top: 64px;
}

.case-detail__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
    gap: 48px;
}

.case-section {
    margin-bottom: 44px;
}

.case-section h2 {
    position: relative;
    margin-bottom: 18px;
    padding-left: 16px;
    font-size: 23px;
    font-weight: 600;
    letter-spacing: -.01em;
}

.case-section h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 3px;
    border-radius: 99px;
    background: linear-gradient(180deg, var(--cyan), var(--blue));
}

.case-summary {
    color: var(--ink-2);
    font-size: 17px;
    line-height: 1.95;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.gallery__item {
    display: block;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--bg-2);
    cursor: zoom-in;
}

.gallery__item img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform .6s var(--ease), opacity .3s var(--ease);
}

.gallery__item:hover img {
    transform: scale(1.04);
    opacity: .88;
}

.case-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 26px 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--glass);
}

.case-cta h3 {
    margin-bottom: 4px;
    font-size: 18px;
    font-weight: 600;
}

.case-cta p {
    color: var(--muted-2);
    font-size: 13px;
}

.case-aside {
    position: sticky;
    top: 104px;
}

.aside-card {
    padding: 26px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background:
        radial-gradient(100% 100% at 100% 0%, rgba(67, 217, 255, .1), transparent 55%),
        rgba(8, 23, 41, .72);
    box-shadow: var(--shadow-lg);
}

.aside-card__kicker {
    display: block;
    margin-bottom: 10px;
    color: var(--cyan);
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: .18em;
}

.aside-card h3 {
    margin-bottom: 8px;
    font-size: 22px;
    font-weight: 600;
}

.aside-card > p {
    margin-bottom: 18px;
    color: var(--muted-2);
    font-size: 13px;
    line-height: 1.8;
}

.aside-card__phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 14px;
    color: var(--ink-2);
    font-size: 15px;
    font-weight: 600;
}

.aside-card__phone .icon {
    color: var(--cyan);
}

.aside-card ul {
    display: grid;
    gap: 9px;
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.aside-card li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--muted-2);
    font-size: 12px;
}

.aside-card li .icon {
    width: 14px;
    height: 14px;
    margin-top: 3px;
    color: var(--cyan);
}

.case-related {
    padding-top: 20px;
    padding-bottom: clamp(80px, 9vw, 120px);
}

/* ---------- 灯箱 ---------- */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(2, 8, 18, .94);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), visibility .3s;
}

.lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.lightbox__figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    max-width: 92vw;
    max-height: 88vh;
}

.lightbox__figure img {
    max-width: 90vw;
    max-height: 80vh;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 12px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, .65);
    object-fit: contain;
}

.lightbox__figure figcaption {
    color: var(--muted);
    font-size: 12px;
}

.lightbox__close,
.lightbox__nav {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 50%;
    background: rgba(255, 255, 255, .06);
    color: #fff;
    transition: background .25s var(--ease), transform .25s var(--ease);
}

.lightbox__close:hover,
.lightbox__nav:hover {
    background: rgba(67, 217, 255, .18);
    transform: scale(1.05);
}

.lightbox__close {
    top: 24px;
    right: 24px;
}

.lightbox__nav {
    top: 50%;
    margin-top: -23px;
}

.lightbox__nav--prev {
    left: 24px;
}

.lightbox__nav--next {
    right: 24px;
}

.lightbox__nav .icon {
    width: 20px;
    height: 20px;
}

.lightbox__nav--prev .icon {
    transform: rotate(180deg);
}

.lightbox__close .icon {
    width: 20px;
    height: 20px;
}

/* ---------- 入场动画 ---------- */

.js [data-reveal] {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity .85s var(--ease), transform .85s var(--ease);
    will-change: opacity, transform;
}

.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1100px) {
    .hero__inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero {
        padding-top: 148px;
    }

    .hero__visual {
        min-height: 460px;
    }

    .hero__ring {
        width: 420px;
        height: 420px;
    }

    .float-card--one {
        right: 4%;
    }

    .float-card--two {
        left: 2%;
    }

    .process__line {
        display: none;
    }

    .process__steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 28px 18px;
    }

    .process-step__num {
        margin-bottom: 16px;
    }

    .case-detail__grid {
        grid-template-columns: minmax(0, 1fr) 290px;
        gap: 34px;
    }
}

@media (max-width: 960px) {
    :root {
        --header-height: 72px;
    }

    .primary-nav,
    .header-cta {
        display: none;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .menu-toggle.is-open .menu-toggle__open {
        display: none;
    }

    .menu-toggle.is-open .menu-toggle__close {
        display: block;
    }

    .benefit-grid,
    .solution-grid,
    .case-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-head {
        display: block;
    }

    .section-head__lead {
        max-width: 620px;
        margin-top: 16px;
        padding-bottom: 0;
    }

    .contact {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .contact__copy > p {
        max-width: 620px;
    }

    .case-detail__grid {
        grid-template-columns: 1fr;
    }

    .case-aside {
        position: static;
    }

    .case-hero__grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .site-footer__top {
        grid-template-columns: 1.4fr 1fr 1fr;
    }

    .site-footer__brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 760px) {
    .container {
        width: calc(100% - 32px);
    }

    .hero {
        padding: 128px 0 76px;
    }

    .hero__title {
        font-size: clamp(36px, 10vw, 50px);
    }

    .hero__lead {
        font-size: 15.5px;
    }

    .hero__meta {
        gap: 14px;
        margin-top: 36px;
    }

    .metric strong {
        font-size: 25px;
    }

    .hero__visual {
        min-height: 420px;
    }

    .delivery-card {
        padding: 20px;
        transform: none;
    }

    .hero__ring {
        width: 330px;
        height: 330px;
    }

    .float-card--one {
        top: 2%;
        right: 0;
    }

    .float-card--two {
        bottom: 2%;
        left: 0;
    }

    .float-card {
        padding: 10px 12px;
    }

    .float-card strong {
        font-size: 12px;
    }

    .section {
        padding: 68px 0;
    }

    .section-head {
        margin-bottom: 34px;
    }

    .benefit-card,
    .solution-card {
        min-height: 220px;
        padding: 24px;
    }

    .process__steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .contact-form-wrap {
        padding: 24px;
    }

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

    .contact-form__foot {
        display: block;
    }

    .contact-form__foot p {
        margin-bottom: 14px;
    }

    .contact-form__foot .btn {
        width: 100%;
    }

    .site-footer__top {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 30px;
    }

    .site-footer__brand {
        grid-column: 1 / -1;
    }

    .site-footer__bottom {
        display: block;
    }

    .site-footer__bottom span {
        display: block;
    }

    .site-footer__bottom span + span {
        margin-top: 6px;
    }

    .page-hero {
        padding: 128px 0 42px;
    }

    .case-hero {
        padding-top: 124px;
    }

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

    .case-cta {
        display: block;
    }

    .case-cta .btn {
        margin-top: 16px;
    }

    .cta-band__inner {
        display: block;
        padding: 30px 24px;
    }

    .cta-band .btn {
        margin-top: 20px;
    }

    .lightbox {
        padding: 18px;
    }

    .lightbox__nav {
        display: none;
    }
}

@media (max-width: 560px) {
    .benefit-grid,
    .solution-grid,
    .case-grid {
        grid-template-columns: 1fr;
    }

    .process__steps {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .process-step {
        display: grid;
        grid-template-columns: 52px minmax(0, 1fr);
        column-gap: 14px;
        padding: 0;
    }

    .process-step__num {
        grid-row: 1 / 3;
        margin-bottom: 0;
    }

    .process-step h3 {
        align-self: end;
        margin-bottom: 4px;
    }

    .process-step p {
        align-self: start;
    }

    .hero__actions .btn {
        width: 100%;
    }

    .hero__meta {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .hero__tags span {
        font-size: 11px;
    }

    .site-footer__top {
        grid-template-columns: 1fr;
    }

    .section-head h2,
    .contact__copy h2 {
        font-size: 29px;
    }

    .back-top {
        right: 14px;
        bottom: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }

    .js [data-reveal] {
        opacity: 1;
        transform: none;
    }
}