@charset "utf-8";
/* ============================================================
   帝一门窗官网首页样式  (自包含, 不依赖 AdminLTE/Bootstrap)
   设计: 白 / 深灰 #333 / 强调橙 #FF9900
   ============================================================ */

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

:root {
    --c-white: #ffffff;
    --c-bg: #ffffff;
    --c-bg-soft: #f5f5f5;
    --c-hero: #333333;
    --c-text: #333333;
    --c-text-soft: #666666;
    --c-text-mute: #999999;
    --c-accent: #ff9900;
    --c-accent-dark: #ff7700;
    --c-border: #e8e8e8;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, .10);
    --shadow-lg: 0 16px 50px rgba(0, 0, 0, .16);

    --radius: 10px;
    --radius-lg: 16px;

    --maxw: 1200px;

    --ease: cubic-bezier(.22, .61, .36, 1);

    --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
        "Helvetica Neue", Helvetica, Arial, sans-serif;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    -webkit-transition: color .25s var(--ease);
    transition: color .25s var(--ease);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

/* ---------- 通用容器 / 标题 ---------- */
.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: clamp(48px, 8vw, 90px) 0;
}

.section--soft {
    background: var(--c-bg-soft);
}

.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto clamp(36px, 5vw, 60px);
}

.section-title {
    font-size: clamp(24px, 3.6vw, 34px);
    font-weight: 700;
    margin: 0 0 14px;
    letter-spacing: 1px;
}

.section-title .en {
    display: block;
    font-size: .42em;
    font-weight: 400;
    letter-spacing: 3px;
    color: var(--c-text-mute);
    text-transform: uppercase;
    margin-top: 8px;
}

.section-title::after {
    content: "";
    display: block;
    width: 54px;
    height: 3px;
    background: var(--c-accent);
    margin: 18px auto 0;
    border-radius: 2px;
}

.section-desc {
    color: var(--c-text-soft);
    font-size: clamp(15px, 1.6vw, 17px);
    margin: 0;
}

/* ============================================================
   导航栏
   ============================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    background: rgba(255, 255, 255, .92);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-transition: -webkit-box-shadow .3s var(--ease), height .3s var(--ease);
    transition: box-shadow .3s var(--ease), height .3s var(--ease);
}

.navbar.is-scrolled {
    height: 64px;
    -webkit-box-shadow: var(--shadow-sm);
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    height: 100%;
}

/* logo */
.brand {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 12px;
}

.brand__icon {
    width: 40px;
    height: 40px;
    -ms-flex-negative: 0;
    flex-shrink: 0;
}

.brand__icon svg,
.brand__icon img {
    width: 100%;
    height: 100%;
    display: block;
}

.brand__text {
    line-height: 1.15;
}

.brand__zh {
    display: block;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
}

.brand__en {
    display: block;
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--c-text-mute);
    text-transform: uppercase;
}

/* 菜单 */
.nav-menu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 6px;
}

.nav-menu a {
    position: relative;
    display: block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text);
}

.nav-menu a::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 4px;
    height: 2px;
    background: var(--c-accent);
    -webkit-transform: scaleX(0);
    transform: scaleX(0);
    -webkit-transform-origin: left;
    transform-origin: left;
    -webkit-transition: -webkit-transform .28s var(--ease);
    transition: transform .28s var(--ease);
}

.nav-menu a:hover,
.nav-menu a.is-active {
    color: var(--c-accent);
}

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

/* 语言切换 */
.nav-actions {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 14px;
    margin-left: 12px;
}

.lang-switch {
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
    border: 1px solid var(--c-border);
    border-radius: 999px;
    overflow: hidden;
    font-size: 13px;
}

.lang-switch button {
    padding: 6px 12px;
    color: var(--c-text-soft);
    font-weight: 600;
    -webkit-transition: all .25s var(--ease);
    transition: all .25s var(--ease);
}

.lang-switch button.is-active {
    background: var(--c-accent);
    color: #fff;
}

/* 汉堡按钮(移动端) */
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    -webkit-transition: all .3s var(--ease);
    transition: all .3s var(--ease);
}

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

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

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

/* 移动端遮罩 */
.nav-overlay {
    display: none;
}

/* ============================================================
   首屏 Hero
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
    margin-top: 0;
    padding-top: 72px;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -2;
    background: #2a2a2a;
}

.hero__bg img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    opacity: 0;
    position: absolute;
    inset: 0;
    -webkit-transition: opacity 1.4s var(--ease);
    transition: opacity 1.4s var(--ease);
}

.hero__bg img.is-active {
    opacity: 1;
}

.hero__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: -webkit-linear-gradient(top, rgba(20, 20, 20, .55) 0%, rgba(20, 20, 20, .45) 50%, rgba(20, 20, 20, .65) 100%);
    background: linear-gradient(to bottom, rgba(20, 20, 20, .55) 0%, rgba(20, 20, 20, .45) 50%, rgba(20, 20, 20, .65) 100%);
    z-index: 1;
}

.hero__inner {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 24px;
}

.hero__tag {
    display: inline-block;
    padding: 6px 18px;
    border: 1px solid rgba(255, 255, 255, .5);
    border-radius: 999px;
    font-size: 13px;
    letter-spacing: 3px;
    margin-bottom: 26px;
    opacity: 0;
    -webkit-transform: translateY(20px);
    transform: translateY(20px);
    -webkit-animation: heroIn .8s var(--ease) .2s forwards;
    animation: heroIn .8s var(--ease) .2s forwards;
}

.hero__title {
    font-size: clamp(34px, 7vw, 64px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 4px;
    margin: 0 0 18px;
    opacity: 0;
    -webkit-transform: translateY(24px);
    transform: translateY(24px);
    -webkit-animation: heroIn .9s var(--ease) .4s forwards;
    animation: heroIn .9s var(--ease) .4s forwards;
}

.hero__title .accent {
    color: var(--c-accent);
}

.hero__subtitle {
    font-size: clamp(15px, 1.8vw, 18px);
    font-weight: 400;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, .88);
    margin: 0 auto 40px;
    max-width: 640px;
    opacity: 0;
    -webkit-transform: translateY(24px);
    transform: translateY(24px);
    -webkit-animation: heroIn .9s var(--ease) .6s forwards;
    animation: heroIn .9s var(--ease) .6s forwards;
}

.hero__btns {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    gap: 16px;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    opacity: 0;
    -webkit-transform: translateY(24px);
    transform: translateY(24px);
    -webkit-animation: heroIn .9s var(--ease) .8s forwards;
    animation: heroIn .9s var(--ease) .8s forwards;
}

@-webkit-keyframes heroIn {
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
}

@keyframes heroIn {
    to {
        opacity: 1;
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 13px 34px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 999px;
    -webkit-transition: all .28s var(--ease);
    transition: all .28s var(--ease);
    border: 1px solid transparent;
}

.btn--primary {
    background: var(--c-accent);
    color: #fff;
    -webkit-box-shadow: 0 8px 20px rgba(255, 153, 0, .35);
    box-shadow: 0 8px 20px rgba(255, 153, 0, .35);
}

.btn--primary:hover {
    background: var(--c-accent-dark);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
    -webkit-box-shadow: 0 12px 26px rgba(255, 119, 0, .42);
    box-shadow: 0 12px 26px rgba(255, 119, 0, .42);
}

.btn--ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, .6);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, .12);
    border-color: #fff;
}

.btn--block {
    width: 100%;
    text-align: center;
}

/* hero 滚动指示 */
.hero__scroll {
    position: absolute;
    bottom: 28px;
    left: 50%;
    -webkit-transform: translateX(-50%);
    transform: translateX(-50%);
    z-index: 3;
    color: rgba(255, 255, 255, .7);
    font-size: 12px;
    letter-spacing: 2px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 6px;
}

.hero__scroll .mouse {
    width: 22px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, .6);
    border-radius: 14px;
    position: relative;
}

.hero__scroll .mouse::after {
    content: "";
    position: absolute;
    top: 7px;
    left: 50%;
    width: 3px;
    height: 7px;
    margin-left: -1.5px;
    background: #fff;
    border-radius: 2px;
    -webkit-animation: scrollDot 1.6s infinite;
    animation: scrollDot 1.6s infinite;
}

@-webkit-keyframes scrollDot {
    0% { opacity: 0; -webkit-transform: translateY(0); transform: translateY(0); }
    40% { opacity: 1; }
    80% { opacity: 0; -webkit-transform: translateY(12px); transform: translateY(12px); }
    100% { opacity: 0; }
}

@keyframes scrollDot {
    0% { opacity: 0; -webkit-transform: translateY(0); transform: translateY(0); }
    40% { opacity: 1; }
    80% { opacity: 0; -webkit-transform: translateY(12px); transform: translateY(12px); }
    100% { opacity: 0; }
}

/* ============================================================
   产品中心
   ============================================================ */
.product {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(28px, 5vw, 60px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.product__media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    aspect-ratio: 4 / 3;
    cursor: -webkit-zoom-in;
    cursor: zoom-in;
}

.product__media img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    -webkit-transition: -webkit-transform .8s var(--ease);
    transition: transform .8s var(--ease);
}

.product__media:hover img {
    -webkit-transform: scale(1.06);
    transform: scale(1.06);
}

/* 可点击放大的视觉提示遮罩 + 角标 */
.product__media[data-zoom]::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(20, 20, 20, .28);
    opacity: 0;
    -webkit-transition: opacity .35s var(--ease);
    transition: opacity .35s var(--ease);
}

.product__media[data-zoom]:hover::after,
.product__media[data-zoom]:focus-visible::after {
    opacity: 1;
}

.product__zoom {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 2;
    width: 52px;
    height: 52px;
    margin: -26px 0 0 -26px;
    border-radius: 50%;
    background: var(--c-accent);
    color: #fff;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    opacity: 0;
    -webkit-transform: scale(.6);
    transform: scale(.6);
    -webkit-transition: all .35s var(--ease);
    transition: all .35s var(--ease);
    pointer-events: none;
}

.product__media[data-zoom]:hover .product__zoom,
.product__media[data-zoom]:focus-visible .product__zoom {
    opacity: 1;
    -webkit-transform: scale(1);
    transform: scale(1);
}

.product__zoom svg {
    width: 24px;
    height: 24px;
}

.product__media[data-zoom]:focus-visible {
    outline: 3px solid var(--c-accent);
    outline-offset: 2px;
}

.product__badge {
    position: absolute;
    top: 18px;
    left: 18px;
    background: var(--c-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: 999px;
}

.product__body h3 {
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 700;
    margin: 0 0 8px;
}

.product__body .en {
    display: block;
    color: var(--c-text-mute);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.product__body p {
    color: var(--c-text-soft);
    margin: 0 0 24px;
}

.feature-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 20px;
    margin-bottom: 28px;
}

.feature-list li {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--c-text);
}

.feature-list .tick {
    width: 20px;
    height: 20px;
    -ms-flex-negative: 0;
    flex-shrink: 0;
    color: var(--c-accent);
}

/* ============================================================
   CCTV 品牌背书
   ============================================================ */
.endorse {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    text-align: center;
    max-width: 820px;
    margin: 0 auto;
}

.endorse__logo {
    width: 160px;
    height: 160px;
    margin-bottom: 28px;
    border-radius: 50%;
    background: #fff;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    border: 1px solid var(--c-border);
}

.endorse__logo svg {
    width: 56%;
    height: 56%;
}

.endorse h3 {
    font-size: clamp(22px, 2.6vw, 28px);
    margin: 0 0 14px;
    font-weight: 700;
}

.endorse p {
    color: var(--c-text-soft);
    margin: 0;
    max-width: 620px;
}

/* ============================================================
   关于我们
   ============================================================ */
.about {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: clamp(30px, 5vw, 64px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.about__media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    aspect-ratio: 5 / 4;
}

.about__media img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
}

/* 关于我们 · 宣传片 */
.about__media--video {
    aspect-ratio: 16 / 9;
    background: #111;
    position: relative;
}

.about-video {
    position: relative;
    width: 100%;
    height: 100%;
}

.about-video__el {
    display: block;
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    background: #111;
    vertical-align: top;
}

.about-video__play {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    gap: 12px;
    margin: 0;
    padding: 0;
    border: 0;
    background: rgba(0, 0, 0, .28);
    color: #fff;
    cursor: pointer;
    -webkit-transition: background .35s var(--ease);
    transition: background .35s var(--ease);
}

.about-video__play:hover,
.about-video__play:focus-visible {
    background: rgba(0, 0, 0, .4);
    outline: none;
}

.about-video__play-ring {
    position: absolute;
    width: 78px;
    height: 78px;
    border-radius: 50%;
    background: rgba(255, 153, 0, .18);
    -webkit-animation: about-video-pulse 2s ease-out infinite;
    animation: about-video-pulse 2s ease-out infinite;
}

.about-video__play svg {
    position: relative;
    z-index: 1;
    width: 68px;
    height: 68px;
    padding: 18px 16px 18px 22px;
    border-radius: 50%;
    background: var(--c-accent);
    color: #fff;
    -webkit-box-shadow: 0 10px 28px rgba(255, 153, 0, .45);
    box-shadow: 0 10px 28px rgba(255, 153, 0, .45);
    -webkit-transition: -webkit-transform .25s var(--ease), background .25s var(--ease);
    transition: transform .25s var(--ease), background .25s var(--ease);
}

.about-video__play:hover svg,
.about-video__play:focus-visible svg {
    background: var(--c-accent-dark);
    -webkit-transform: scale(1.06);
    transform: scale(1.06);
}

.about-video__play-text {
    position: relative;
    z-index: 1;
    font-size: 13px;
    letter-spacing: 2px;
    font-weight: 600;
    text-shadow: 0 1px 6px rgba(0, 0, 0, .35);
}

.about-video__badge {
    position: absolute;
    left: 14px;
    top: 14px;
    z-index: 3;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(0, 0, 0, .55);
    color: #fff;
    font-size: 12px;
    letter-spacing: 1px;
    pointer-events: none;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.about-video.is-playing .about-video__play,
.about-video.is-playing .about-video__badge {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    -webkit-transition: opacity .3s var(--ease), visibility .3s var(--ease);
    transition: opacity .3s var(--ease), visibility .3s var(--ease);
}

.about-video.is-playing .about-video__el {
    -o-object-fit: contain;
    object-fit: contain;
    background: #000;
}

@-webkit-keyframes about-video-pulse {
    0% { -webkit-transform: scale(.9); opacity: .85; transform: scale(.9); }
    70% { -webkit-transform: scale(1.35); opacity: 0; transform: scale(1.35); }
    100% { -webkit-transform: scale(1.35); opacity: 0; transform: scale(1.35); }
}

@keyframes about-video-pulse {
    0% { -webkit-transform: scale(.9); opacity: .85; transform: scale(.9); }
    70% { -webkit-transform: scale(1.35); opacity: 0; transform: scale(1.35); }
    100% { -webkit-transform: scale(1.35); opacity: 0; transform: scale(1.35); }
}

.about__body h3 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin: 0 0 6px;
}

.about__body .lead-en {
    color: var(--c-accent);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 22px;
    display: block;
}

.about__body p {
    color: var(--c-text-soft);
    margin: 0 0 16px;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 30px;
}

.about__stat {
    text-align: center;
    padding: 18px 8px;
    background: var(--c-bg-soft);
    border-radius: var(--radius);
}

.about__stat b {
    display: block;
    font-size: clamp(24px, 3vw, 32px);
    color: var(--c-accent);
    font-weight: 700;
    line-height: 1;
}

.about__stat span {
    display: block;
    font-size: 13px;
    color: var(--c-text-soft);
    margin-top: 6px;
}

/* ============================================================
   社会责任
   ============================================================ */
.csr {
    display: grid;
    grid-template-columns: .95fr 1.05fr;
    gap: clamp(30px, 5vw, 64px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.csr__media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    aspect-ratio: 4 / 3;
}

.csr__media img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    -webkit-transition: -webkit-transform .8s var(--ease);
    transition: transform .8s var(--ease);
}

.csr__media:hover img {
    -webkit-transform: scale(1.05);
    transform: scale(1.05);
}

.csr__badge {
    position: absolute;
    top: 18px;
    left: 18px;
    background: var(--c-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: 999px;
}

.csr__kicker {
    color: var(--c-accent);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
    display: block;
}

.csr__body h3 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin: 0 0 6px;
}

.csr__body .en {
    color: var(--c-text-mute);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 22px;
    display: block;
}

.csr__body p {
    color: var(--c-text-soft);
    margin: 0 0 24px;
}

.csr__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 14px;
}

.csr__list li {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--c-text);
}

.csr__list .tick {
    width: 20px;
    height: 20px;
    -ms-flex-negative: 0;
    flex-shrink: 0;
    color: var(--c-accent);
}

@media (max-width: 860px) {
    .csr {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   为什么选择我们 (4 卡)
   ============================================================ */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.adv-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    -webkit-transition: all .35s var(--ease);
    transition: all .35s var(--ease);
}

.adv-card:hover {
    -webkit-transform: translateY(-8px);
    transform: translateY(-8px);
    -webkit-box-shadow: var(--shadow-lg);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.adv-card__icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 22px;
    border-radius: 50%;
    background: rgba(255, 153, 0, .12);
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    color: var(--c-accent);
    -webkit-transition: all .35s var(--ease);
    transition: all .35s var(--ease);
}

.adv-card:hover .adv-card__icon {
    background: var(--c-accent);
    color: #fff;
    -webkit-transform: rotate(-8deg);
    transform: rotate(-8deg);
}

.adv-card__icon svg {
    width: 34px;
    height: 34px;
}

.adv-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 6px;
}

.adv-card .en {
    display: block;
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--c-text-mute);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.adv-card p {
    font-size: 14px;
    color: var(--c-text-soft);
    margin: 0;
}

/* ============================================================
   权威质检报告
   预览按网站卡片尺寸展示(约 A4 缩略图), 避免整页铺满半栏
   ============================================================ */
.report {
    display: grid;
    grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
    gap: clamp(22px, 3.5vw, 40px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    -webkit-box-shadow: var(--shadow-sm);
    box-shadow: var(--shadow-sm);
    padding: clamp(18px, 3vw, 32px);
}

.report__preview {
    position: relative;
    display: block;
    width: 100%;
    max-width: 260px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    aspect-ratio: 1 / 1.35;
    max-height: 360px;
    background: #f0f0f0;
}

.report__preview img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    -o-object-position: top center;
    object-position: top center;
    -webkit-transition: -webkit-transform .8s var(--ease);
    transition: transform .8s var(--ease);
}

.report__preview:hover img {
    -webkit-transform: scale(1.04);
    transform: scale(1.04);
}

.report__preview::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(20, 20, 20, .28);
    opacity: 0;
    -webkit-transition: opacity .35s var(--ease);
    transition: opacity .35s var(--ease);
}

.report__preview:hover::after {
    opacity: 1;
}

.report__zoom {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 2;
    width: 48px;
    height: 48px;
    margin: -24px 0 0 -24px;
    border-radius: 50%;
    background: var(--c-accent);
    color: #fff;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    opacity: 0;
    -webkit-transform: scale(.6);
    transform: scale(.6);
    -webkit-transition: all .35s var(--ease);
    transition: all .35s var(--ease);
}

.report__preview:hover .report__zoom {
    opacity: 1;
    -webkit-transform: scale(1);
    transform: scale(1);
}

.report__zoom svg {
    width: 22px;
    height: 22px;
}

.report__body {
    min-width: 0;
}

.report__tag {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(255, 153, 0, .12);
    color: var(--c-accent);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.report__body h3 {
    font-size: clamp(18px, 2.2vw, 24px);
    font-weight: 700;
    margin: 0 0 18px;
    line-height: 1.4;
}

.report__meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 20px;
    margin: 0 0 18px;
}

.report__meta li {
    border-left: 3px solid var(--c-accent);
    padding-left: 12px;
    min-width: 0;
}

.report__meta .label {
    display: block;
    font-size: 12px;
    color: var(--c-text-mute);
    margin-bottom: 3px;
}

.report__meta .value {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.45;
    word-break: break-word;
}

.report__note {
    font-size: 14px;
    color: var(--c-text-soft);
    background: var(--c-bg-soft);
    border-radius: var(--radius);
    padding: 12px 14px;
    margin: 0 0 20px;
    line-height: 1.7;
}

.report__btns {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 12px;
}

/* 深色描边按钮(用于浅色背景区块) */
.btn--ghost-dark {
    background: transparent;
    color: var(--c-text);
    border-color: var(--c-border);
}

.btn--ghost-dark:hover {
    background: var(--c-text);
    color: #fff;
    border-color: var(--c-text);
}

/* ============================================================
   4 大核心技术 (图文交替)
   ============================================================ */
.tech-list {
    display: grid;
    gap: clamp(40px, 6vw, 80px);
}

.tech-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(30px, 5vw, 64px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.tech-item--reverse .tech-item__media {
    -webkit-box-ordinal-group: 3;
    -ms-flex-order: 2;
    order: 2;
}

.tech-item__media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
    aspect-ratio: 4 / 3;
}

.tech-item__media img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    -webkit-transition: -webkit-transform .8s var(--ease);
    transition: transform .8s var(--ease);
}

.tech-item__media:hover img {
    -webkit-transform: scale(1.05);
    transform: scale(1.05);
}

.tech-item__num {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--c-accent);
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.tech-item__num::before {
    content: "";
    display: inline-block;
    width: 30px;
    height: 2px;
    background: var(--c-accent);
    vertical-align: middle;
    margin-right: 10px;
}

.tech-item h3 {
    font-size: clamp(22px, 2.6vw, 28px);
    font-weight: 700;
    margin: 0 0 8px;
}

.tech-item .en {
    display: block;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--c-text-mute);
    text-transform: uppercase;
    margin-bottom: 18px;
}

.tech-item p {
    color: var(--c-text-soft);
    margin: 0;
}

/* ============================================================
   联系表单
   ============================================================ */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: clamp(30px, 5vw, 64px);
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.contact-info h3 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin: 0 0 8px;
}

.contact-info .en {
    display: block;
    color: var(--c-accent);
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 22px;
}

.contact-info p {
    color: var(--c-text-soft);
    margin: 0 0 26px;
}

.contact-list {
    display: grid;
    gap: 18px;
}

.contact-list li {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 14px;
}

.contact-list .ico {
    width: 42px;
    height: 42px;
    -ms-flex-negative: 0;
    flex-shrink: 0;
    border-radius: 50%;
    background: rgba(255, 153, 0, .12);
    color: var(--c-accent);
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
}

.contact-list .ico svg {
    width: 20px;
    height: 20px;
}

.contact-list .label {
    display: block;
    font-size: 12px;
    color: var(--c-text-mute);
}

.contact-list .value {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--c-text);
}

/* 表单卡片 */
.contact-form {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: clamp(28px, 4vw, 44px);
    -webkit-box-shadow: var(--shadow-lg);
    box-shadow: var(--shadow-lg);
}

.form-row {
    margin-bottom: 20px;
}

.form-row label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--c-text);
}

.form-row label .req {
    color: var(--c-accent);
    margin-left: 2px;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 13px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-bg-soft);
    border: 1px solid transparent;
    border-radius: var(--radius);
    -webkit-transition: all .25s var(--ease);
    transition: all .25s var(--ease);
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    background: #fff;
    border-color: var(--c-accent);
    -webkit-box-shadow: 0 0 0 3px rgba(255, 153, 0, .15);
    box-shadow: 0 0 0 3px rgba(255, 153, 0, .15);
}

.form-row textarea {
    resize: vertical;
    min-height: 110px;
}

.form-row.is-error input,
.form-row.is-error textarea {
    border-color: #e53935;
    background: #fff5f5;
}

.form-error {
    display: none;
    color: #e53935;
    font-size: 12px;
    margin-top: 6px;
}

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

.form-msg {
    display: none;
    margin-top: 8px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    text-align: center;
}

.form-msg.is-ok {
    display: block;
    background: #e8f8ee;
    color: #2e8b57;
    border: 1px solid #bfe6cf;
}

/* ============================================================
   新闻动态
   ============================================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-sm);
    box-shadow: var(--shadow-sm);
    -webkit-transition: all .35s var(--ease);
    transition: all .35s var(--ease);
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
}

.news-card:hover {
    -webkit-transform: translateY(-6px);
    transform: translateY(-6px);
    -webkit-box-shadow: var(--shadow-md);
    box-shadow: var(--shadow-md);
}

.news-card__media {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

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

.news-card:hover .news-card__media img {
    -webkit-transform: scale(1.06);
    transform: scale(1.06);
}

.news-card__body {
    padding: 22px 22px 26px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-flex: 1;
    -ms-flex-positive: 1;
    flex: 1;
}

.news-card__date {
    font-size: 12px;
    color: var(--c-accent);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.news-card h4 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    margin: 0 0 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    font-size: 13px;
    color: var(--c-text-soft);
    margin: 0 0 16px;
    -webkit-box-flex: 1;
    -ms-flex-positive: 1;
    flex: 1;
}

.news-card__more {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-accent);
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 4px;
}

.news-card__more::after {
    content: "→";
    -webkit-transition: -webkit-transform .25s var(--ease);
    transition: transform .25s var(--ease);
}

.news-card:hover .news-card__more::after {
    -webkit-transform: translateX(4px);
    transform: translateX(4px);
}

/* ============================================================
   公司环境画廊
   ============================================================ */
.gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 200px;
    gap: 16px;
}

.gallery__item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    -webkit-box-shadow: var(--shadow-sm);
    box-shadow: var(--shadow-sm);
}

.gallery__item img {
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover;
    -webkit-transition: -webkit-transform .8s var(--ease);
    transition: transform .8s var(--ease);
}

.gallery__item::after {
    content: "";
    position: absolute;
    inset: 0;
    background: -webkit-linear-gradient(top, transparent 50%, rgba(0, 0, 0, .55) 100%);
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, .55) 100%);
    opacity: 0;
    -webkit-transition: opacity .35s var(--ease);
    transition: opacity .35s var(--ease);
}

.gallery__item:hover::after,
.gallery__item:hover .gallery__cap {
    opacity: 1;
}

.gallery__item:hover img {
    -webkit-transform: scale(1.08);
    transform: scale(1.08);
}

.gallery__cap {
    position: absolute;
    left: 16px;
    bottom: 14px;
    z-index: 2;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    opacity: 0;
    -webkit-transition: opacity .35s var(--ease);
    transition: opacity .35s var(--ease);
}

.gallery__item--wide {
    grid-column: span 2;
}

.gallery__item--tall {
    grid-row: span 2;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
    background: #1f1f1f;
    color: rgba(255, 255, 255, .75);
    padding: 64px 0 0;
}

.footer__top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.footer__brand .brand__zh {
    color: #fff;
    font-size: 22px;
}

.footer__brand p {
    margin: 18px 0 0;
    font-size: 14px;
    line-height: 1.85;
    color: rgba(255, 255, 255, .6);
    max-width: 340px;
}

.footer__brand .footer-tel {
    margin-top: 20px;
    display: block;
}

.footer__brand .footer-tel .label {
    font-size: 12px;
    color: rgba(255, 255, 255, .5);
    display: block;
}

.footer__brand .footer-tel .num {
    font-size: 26px;
    font-weight: 700;
    color: var(--c-accent);
    letter-spacing: 1px;
}

.footer__col h5 {
    color: #fff;
    font-size: 16px;
    margin: 0 0 18px;
    font-weight: 600;
}

.footer__col ul {
    display: grid;
    gap: 12px;
}

.footer__col a {
    font-size: 14px;
    color: rgba(255, 255, 255, .6);
}

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

.footer__bottom {
    padding: 22px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, .45);
}

.footer__bottom a {
    color: rgba(255, 255, 255, .45);
}

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

.footer__bottom .sep {
    margin: 0 8px;
    opacity: .5;
}

/* ============================================================
   滚动出现动画
   ============================================================ */
.reveal {
    opacity: 0;
    -webkit-transform: translateY(36px);
    transform: translateY(36px);
    -webkit-transition: opacity .8s var(--ease), -webkit-transform .8s var(--ease);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
}

.reveal.is-visible {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
}

.reveal[data-delay="1"] { -webkit-transition-delay: .1s; transition-delay: .1s; }
.reveal[data-delay="2"] { -webkit-transition-delay: .2s; transition-delay: .2s; }
.reveal[data-delay="3"] { -webkit-transition-delay: .3s; transition-delay: .3s; }
.reveal[data-delay="4"] { -webkit-transition-delay: .4s; transition-delay: .4s; }

/* ============================================================
   响应式: 平板 ≤1023
   ============================================================ */
@media (max-width: 1023px) {
    /* 质检报告 平板收窄预览, 避免半栏过高 */
    .report {
        grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
        gap: 22px;
        padding: 20px;
    }

    .report__preview {
        max-width: 220px;
        max-height: 300px;
    }

    .report__meta {
        gap: 12px 16px;
    }

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

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

    .gallery {
        grid-template-columns: repeat(3, 1fr);
        grid-auto-rows: 180px;
    }

    .about,
    .contact-wrap {
        grid-template-columns: 1fr;
    }

    .about__media,
    .contact-info {
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* ============================================================
   响应式: 移动端 ≤767
   ============================================================ */
@media (max-width: 767px) {
    body {
        font-size: 15px;
    }

    /* 导航折叠 */
    .nav-toggle {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 78%;
        max-width: 320px;
        background: #fff;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        -ms-flex-direction: column;
        flex-direction: column;
        -webkit-box-align: stretch;
        -ms-flex-align: stretch;
        align-items: stretch;
        -webkit-box-pack: start;
        -ms-flex-pack: start;
        justify-content: flex-start;
        gap: 0;
        padding: 80px 0 30px;
        -webkit-box-shadow: -10px 0 40px rgba(0, 0, 0, .15);
        box-shadow: -10px 0 40px rgba(0, 0, 0, .15);
        -webkit-transform: translateX(100%);
        transform: translateX(100%);
        -webkit-transition: -webkit-transform .35s var(--ease);
        transition: transform .35s var(--ease);
        z-index: 1100;
        overflow-y: auto;
    }

    .nav-menu.is-open {
        -webkit-transform: translateX(0);
        transform: translateX(0);
    }

    .nav-menu a {
        padding: 15px 28px;
        font-size: 16px;
        border-bottom: 1px solid var(--c-bg-soft);
    }

    .nav-menu a::after {
        display: none;
    }

    /* 语言切换 + 汉堡按钮保留在导航栏右侧(正常文档流),
       由父级 .navbar .container 的 justify-content: space-between 贴右 */
    .nav-actions {
        gap: 10px;
        margin-left: auto;
    }

    .lang-switch {
        -webkit-transform: scale(.92);
        transform: scale(.92);
        -webkit-transform-origin: right center;
        transform-origin: right center;
    }

    .nav-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, .45);
        opacity: 0;
        visibility: hidden;
        -webkit-transition: opacity .35s var(--ease), visibility .35s;
        transition: opacity .35s var(--ease), visibility .35s;
        z-index: 1050;
    }

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

    /* 区块间距 */
    .section {
        padding: 48px 0;
    }

    .container {
        padding: 0 18px;
    }

    /* hero */
    .hero {
        min-height: 92vh;
        padding-top: 64px;
    }

    .hero__btns .btn {
        padding: 12px 26px;
        font-size: 14px;
    }

    /* 产品 / 技术 单列 */
    .product,
    .tech-item {
        grid-template-columns: 1fr;
        gap: 26px;
    }

    /* 质检报告 单列 */
    .report {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 18px 16px;
        text-align: center;
    }

    .report__preview {
        max-width: 220px;
        max-height: 300px;
        margin: 0 auto;
    }

    .report__zoom {
        width: 44px;
        height: 44px;
        margin: -22px 0 0 -22px;
        opacity: .92;
        -webkit-transform: scale(1);
        transform: scale(1);
    }

    .report__body {
        text-align: left;
    }

    .report__body h3 {
        font-size: 18px;
        margin-bottom: 14px;
    }

    .report__meta {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 14px;
    }

    .report__note {
        font-size: 13px;
        padding: 12px;
        margin-bottom: 16px;
    }

    .report__btns {
        gap: 10px;
    }

    .report__btns .btn {
        -webkit-box-flex: 1;
        -ms-flex: 1 1 calc(50% - 5px);
        flex: 1 1 calc(50% - 5px);
        min-width: 0;
        text-align: center;
        padding-left: 12px;
        padding-right: 12px;
        font-size: 13px;
    }

    .tech-item--reverse .tech-item__media {
        -webkit-box-ordinal-group: 1;
        -ms-flex-order: 0;
        order: 0;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    /* 关于统计 */
    .about__stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .about__stat {
        padding: 14px 4px;
    }

    /* 卡片单列 */
    .adv-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    /* 画廊 */
    .gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 130px;
        gap: 10px;
    }

    .gallery__item--tall {
        grid-row: span 1;
    }

    /* 表单 */
    .contact-form {
        padding: 24px 20px;
    }

    /* 页脚 */
    .footer__top {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: left;
    }

    .footer {
        padding: 48px 0 0;
    }

    .footer__brand .footer-tel .num {
        font-size: 22px;
    }
}

/* ============================================================
   超小屏 ≤380
   ============================================================ */
@media (max-width: 380px) {
    .report__btns .btn {
        -webkit-box-flex: 1;
        -ms-flex: 1 1 100%;
        flex: 1 1 100%;
    }

    .report__preview {
        max-width: 180px;
        max-height: 250px;
    }

    .hero__title {
        letter-spacing: 2px;
    }
    .gallery {
        grid-template-columns: 1fr;
    }
    .gallery__item--wide {
        grid-column: span 1;
    }
}

/* ============================================================
   图片放大弹窗 (Lightbox)
   ============================================================ */
.lightbox {
    /* 注意: 不在此处声明 display, 否则覆盖 HTML hidden 属性的 display:none */
    position: fixed;
    inset: 0;
    z-index: 2000;
    padding: 32px;
    background: rgba(15, 15, 15, .92);
    opacity: 0;
    -webkit-transition: opacity .3s var(--ease);
    transition: opacity .3s var(--ease);
}

.lightbox[hidden] {
    display: none !important;
}

.lightbox:not([hidden]) {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
}

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

.lightbox__figure {
    margin: 0;
    max-width: 100%;
    max-height: 100%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-transform: scale(.94);
    transform: scale(.94);
    -webkit-transition: -webkit-transform .35s var(--ease);
    transition: transform .35s var(--ease);
}

.lightbox.is-open .lightbox__figure {
    -webkit-transform: scale(1);
    transform: scale(1);
}

.lightbox__figure img {
    max-width: min(92vw, 1100px);
    max-height: min(82vh, 820px);
    width: auto;
    height: auto;
    -o-object-fit: contain;
    object-fit: contain;
    border-radius: var(--radius);
    -webkit-box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
}

.lightbox__cap {
    margin-top: 16px;
    color: rgba(255, 255, 255, .85);
    font-size: 14px;
    letter-spacing: .5px;
    text-align: center;
}

.lightbox__cap:empty {
    display: none;
}

.lightbox__close {
    position: absolute;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .14);
    color: #fff;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-transition: background .25s var(--ease), -webkit-transform .25s var(--ease);
    transition: background .25s var(--ease), transform .25s var(--ease);
}

.lightbox__close:hover {
    background: var(--c-accent);
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
}

.lightbox__close svg {
    width: 22px;
    height: 22px;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        -webkit-animation-duration: .01ms !important;
        animation-duration: .01ms !important;
        -webkit-transition-duration: .01ms !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}