@charset "utf-8";
/* =========================================================================
   方寸间科技 · 首页视觉重构样式表  (jidc.css)
   -------------------------------------------------------------------------
   设计系统参照 jidc.com 的视觉规范：配色体系 / 字阶 / 间距 / 圆角 / 阴影 / 动效
   品牌强调色沿用本站自有品牌绿（收敛至与 jidc 品牌色同级明度），不复制其品牌色。
   字体：Barlow Condensed（拉丁字母与数字）→ 中文回退系统无衬线字体。
   ========================================================================= */

/* ------------------------------------------------------------------ 1. 字体 */
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-400-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-ext-400-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-500-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-ext-500-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-600-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-ext-600-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-700-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
    font-family: "Barlow Condensed";
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("../fonts/barlow-condensed/barlow-condensed-latin-ext-700-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* --------------------------------------------------------- 2. 设计令牌 */
:root {
    color-scheme: light;

    /* 中性色阶 */
    --bg: #f7f9fc;
    --surface: #fff;
    --surface-soft: #eef3f8;
    --surface-highlight: #f3f6f9;
    --text: #182536;
    --text-soft: #596a7d;
    --text-muted: #8290a0;
    --line: #dfe6ed;

    /* 主题色 = jidc.com 同款 #1768A4
       --brand      实心色块（按钮底色、指示点、高亮条、图标底纹），同时驱动页头 logo
       --brand-ink  浅色背景上的文字/线条用色。#1768A4 在白色背景上对比度约 5.9:1，
                    满足 WCAG AA 4.5:1，可直接沿用主色，故与 --brand 同值。
       --brand-on   实心色块上的文字色。主色为深蓝，故取白色。 */
    --brand: #1768a4;
    --brand-dark: #105383;
    --brand-soft: #eaf3fa;
    --brand-ink: #1768a4;
    --brand-on: #ffffff;

    --hero: #edf4fa;
    --night: #15283a;
    --night-line: #304253;
    --night-text: #f1f5f8;
    --night-soft: #afbdc9;

    --radius: 14px;
    --content: 1160px;
    --shadow: 0 12px 34px rgba(19, 43, 66, .06);

    /* 字体栈：Barlow Condensed 承载拉丁字母与数字，中文回退系统字体 */
    --font: "Barlow Condensed", -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

[data-theme="dark"] {
    color-scheme: dark;

    --bg: #101923;
    --surface: #17232f;
    --surface-soft: #1b2b3a;
    --surface-highlight: #15212c;
    --text: #eef3f8;
    --text-soft: #b1bfcc;
    --text-muted: #8494a4;
    --line: #293846;

    /* 深色模式主题色 = jidc.com 同款（浅蓝色系，在白/浅底上仍可读）
       --brand-on 此处为深色：主色 #75B7E5 偏亮，配白字对比度仅约 2:1，
       故实心色块上的文字保持深色以保证可读性。 */
    --brand: #75b7e5;
    --brand-dark: #9acbef;
    --brand-soft: #1d3447;
    --brand-ink: #75b7e5;
    --brand-on: #0b1a26;

    --hero: #172636;
    --night: #0d1721;
    --night-line: #2b3d4d;
    --night-text: #eef3f8;
    --night-soft: #a7b6c3;

    --shadow: 0 12px 34px rgba(0, 0, 0, .18);
}

/* --------------------------------------------------------- 3. 基础重置 */
*, *::before, *::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 84px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.65;
    font-weight: 500;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }
img { border: 0; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, h5, p, dl, dd, figure { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 3px solid var(--brand-ink); outline-offset: 3px; border-radius: 4px; }

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

/* ------------------------------------------------------------- 4. 按钮 */
.button {
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 0 19px;
    border: 1px solid transparent;
    border-radius: 7px;
    background: none;
    text-decoration: none;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .01em;
    cursor: pointer;
    transition: background-color .16s ease, border-color .16s ease,
        color .16s ease, transform .16s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--brand); color: var(--brand-on); }
.button-primary:hover { background: var(--brand-dark); }
.button-secondary,
.button-quiet { color: var(--text); border-color: var(--line); background: transparent; }
.button-secondary:hover,
.button-quiet:hover { color: var(--brand-ink); border-color: var(--brand); }
.button-small { min-height: 36px; padding-inline: 13px; font-size: 13px; }
.button .arrow { transition: transform .16s ease; }
.button:hover .arrow { transform: translate(2px, -2px); }

/* ------------------------------------------------------------ 5. 页头 */
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    height: 72px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}

.header-inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 34px;
}

.brand { display: inline-flex; flex: 0 0 auto; align-items: center; text-decoration: none; }

/* 品牌标识：将 logo 作为遮罩填充主题色 var(--brand)（跟随主题色，不随深浅色模式单独变化） */
.brand-mark {
    display: block;
    width: 112px;
    height: 35px;
    background-color: var(--brand);
    -webkit-mask: url("../img/logo.svg") left center / contain no-repeat;
    mask: url("../img/logo.svg") left center / contain no-repeat;
    transition: background-color .16s ease;
}
.brand:hover .brand-mark { background-color: var(--brand-ink); }

.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 26px;
}
.site-nav a {
    color: var(--text-soft);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: .02em;
    transition: color .16s ease;
}
.site-nav a:hover,
.site-nav a.is-active { color: var(--brand-ink); }

.header-actions { display: flex; align-items: center; gap: 10px; }

.theme-toggle,
.menu-toggle { display: inline-grid; place-items: center; color: var(--text-soft); }

.theme-toggle {
    width: 36px;
    height: 36px;
    padding: 8px;
    border-radius: 50%;
    transition: color .16s ease, background-color .16s ease;
}
.theme-toggle:hover { color: var(--brand-ink); background: var(--brand-soft); }

/* 中英文切换 */
.lang-toggle {
    display: inline-grid;
    place-items: center;
    min-width: 42px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 99px;
    color: var(--text-soft);
    font-size: 12px;
    font-weight: 650;
    letter-spacing: .06em;
    transition: color .16s ease, border-color .16s ease, background-color .16s ease;
}
.lang-toggle:hover { color: var(--brand-ink); border-color: var(--brand); background: var(--brand-soft); }
.theme-toggle svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}
[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    gap: 4px;
    border-radius: 6px;
    flex: 0 0 38px;
}
.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: currentColor;
    transition: transform .16s ease, opacity .16s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --------------------------------------------------- 6. 移动端抽屉导航 */
.mobile-nav { display: none; }
.nav-mask {
    position: fixed;
    inset: 72px 0 0;
    z-index: 25;
    background: rgb(5 17 29 / 55%);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, visibility .2s ease;
}
.nav-mask.is-open { opacity: 1; visibility: visible; }

/* -------------------------------------------------------------- 7. 首屏 */
.hero {
    position: relative;
    padding: 88px 0 34px;
    background: var(--hero);
    overflow: hidden;
}
.hero-slides { display: grid; }
.hero-slide {
    grid-area: 1 / 1;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .5s ease, transform .5s ease, visibility .5s ease;
}
.hero-slide.is-active { opacity: 1; visibility: visible; transform: none; }

.hero h1 {
    margin: 0;
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.16;
    letter-spacing: -.045em;
    font-weight: 680;
}
.hero-copy {
    margin: 20px auto 0;
    max-width: 670px;
    color: var(--text-soft);
    font-size: 16px;
}
.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 27px;
}
.hero-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 54px;
    padding-top: 24px;
    border-top: 1px solid color-mix(in srgb, var(--brand) 18%, var(--line));
}
.hero-dots button {
    width: 26px;
    height: 3px;
    border-radius: 99px;
    background: var(--line);
    transition: background-color .2s ease, width .2s ease;
}
.hero-dots button:hover { background: var(--text-muted); }
.hero-dots button[aria-selected="true"] { width: 40px; background: var(--brand); }

/* --------------------------------------------------------- 8. 通用区块 */
.section { padding: 88px 0; }

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 24px;
    margin-bottom: 28px;
}
.section-heading h2 {
    margin: 0;
    font-size: clamp(27px, 3.2vw, 36px);
    line-height: 1.2;
    letter-spacing: -.035em;
    font-weight: 650;
}
.section-heading h2 .heading-icon {
    width: 26px;
    height: 26px;
    margin-right: 10px;
    vertical-align: -2px;
    color: var(--brand-ink);
}

/* -------------------------------------------------------- 9. 流程四步 */
.steps-section { padding: 34px 0 0; background: var(--hero); }
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    padding-bottom: 88px;
    counter-reset: step;
}
.step {
    padding: 24px 25px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}
.step-index {
    display: block;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 650;
    letter-spacing: .14em;
    font-variant-numeric: tabular-nums;
}
.step-index::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
}
.step h3 {
    margin: 15px 0 4px;
    font-size: 17px;
    font-weight: 650;
    letter-spacing: -.01em;
}
.step p { color: var(--text-soft); font-size: 13px; }

/* ------------------------------------------------------- 10. 产品卡片 */
.product-section { background: var(--bg); }

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

.region-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: 25px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}

.region-heading { display: flex; align-items: center; justify-content: space-between; }

.region-code {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 650;
    letter-spacing: .14em;
    text-transform: uppercase;
}
.region-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 14%, transparent);
}

.region-card h3 {
    margin: 15px 0 6px;
    font-size: 20px;
    line-height: 1.35;
    font-weight: 650;
    letter-spacing: -.02em;
}

.dc-lines { margin: 0 0 4px; }
.dc-lines p {
    color: var(--text-soft);
    font-size: 13px;
    line-height: 1.6;
}
.dc-lines p + p { margin-top: 3px; }

.dc-node {
    display: inline-block;
    margin: 0 4px 0 1px;
    padding: 1px 8px;
    border-radius: 99px;
    background: var(--brand-soft);
    color: var(--brand-ink);
    font-size: 11px;
    font-weight: 600;
    vertical-align: 1px;
}

.card-actions {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    display: grid;
    gap: 0;
}
.card-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 11px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    transition: color .16s ease;
}
.card-action:last-child { border-bottom: 0; padding-bottom: 0; }
.card-action .arrow { color: var(--brand-ink); font-size: 13px; font-weight: 500; transition: transform .16s ease; }
.card-action:hover { color: var(--brand-ink); }
.card-action:hover .arrow { transform: translate(2px, -2px); }

/* ------------------------------------------------------ 11. 能力区块 */
.capabilities {
    padding: 74px 0;
    background: var(--night);
    color: var(--night-text);
}
.capability-layout {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    align-items: start;
    gap: 70px;
}
.capability-layout h2 {
    margin: 0;
    font-size: clamp(29px, 3.4vw, 39px);
    line-height: 1.2;
    letter-spacing: -.035em;
    font-weight: 650;
}
.capability-list { counter-reset: cap; }
.capability-list article {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--night-line);
}
.capability-list article:first-child { padding-top: 0; }
.capability-list article:last-child { padding-bottom: 0; border-bottom: 0; }
.capability-list article > span {
    color: var(--brand);
    font-size: 11px;
    font-weight: 650;
    letter-spacing: .1em;
    font-variant-numeric: tabular-nums;
}
.cap-index::before {
    counter-increment: cap;
    content: counter(cap, decimal-leading-zero);
}
.capability-list h3 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: .01em; }
.capability-list p { margin: 3px 0 0; color: var(--night-soft); font-size: 13px; }

/* ------------------------------------------------------- 12. 联系我们 */
.contact-section { padding: 78px 0; background: var(--bg); }

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 16px;
}
.contact-card {
    padding: 25px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
}
.contact-card h5 {
    margin: 0 0 14px;
    font-size: 15px;
    font-weight: 650;
    letter-spacing: .01em;
}
.contact-card p { color: var(--text-soft); font-size: 13px; }
.contact-card p strong { font-weight: 600; color: var(--text); }
/* 企业简介为多段散文，全局 reset 已清零 p 边距，此处补回段间距 */
.contact-card p + p { margin-top: 10px; }

.contact-col { display: grid; gap: 16px; }

.contact-actions { display: grid; gap: 8px; }
.contact-action {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-soft);
    color: var(--text);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    transition: border-color .16s ease, background-color .16s ease, color .16s ease;
}
.contact-action:hover { border-color: var(--brand); color: var(--brand-ink); background: var(--brand-soft); }
.contact-action svg {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    fill: currentColor;
}

/* ------------------------------------------------------------ 13. 页脚 */
.site-footer {
    padding: 32px 0 20px;
    border-top: 1px solid var(--line);
    background: var(--surface);
}
.footer-legal {
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.9;
}
.footer-legal a { color: inherit; text-decoration: none; }
.footer-legal a:hover { color: var(--brand-ink); }
.footer-legal .legal-separator { margin-inline: 8px; }
.footer-legal br { line-height: 2.4; }

/* ------------------------------------------------- 14. 响应式：≤960px */
@media (max-width: 960px) {
    .container { width: min(var(--content), calc(100% - 40px)); }
    .header-inner { gap: 20px; }
    .site-nav { gap: 16px; }
    .product-grid { gap: 12px; }
    .region-card, .contact-card { padding: 20px; }
    .steps-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .capability-layout { gap: 42px; }
    .contact-grid { gap: 12px; }
}

/* ------------------------------------------------- 15. 响应式：≤720px */
@media (max-width: 720px) {
    html { scroll-padding-top: 70px; }
    .container { width: calc(100% - 36px); }

    .site-header { height: 64px; }
    .header-inner { gap: 10px; }
    .menu-toggle { display: grid; }
    .site-nav { display: none; }
    .brand-mark { width: 96px; height: 30px; }
    .header-actions { gap: 6px; margin-left: auto; }
    .header-actions .button-small { min-height: 33px; padding-inline: 10px; font-size: 12px; }
    .theme-toggle { width: 32px; height: 32px; padding: 6px; }
    .lang-toggle { min-width: 38px; height: 32px; padding: 0 8px; font-size: 11px; }

    .nav-mask { inset: 64px 0 0; }

    .mobile-nav {
        display: block;
        position: absolute;
        top: 63px;
        left: 0;
        right: 0;
        z-index: 28;
        max-height: calc(100vh - 63px);
        overflow-y: auto;
        padding: 4px 18px 14px;
        background: var(--surface);
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    }
    .mobile-nav.is-open { opacity: 1; visibility: visible; transform: none; }

    .mobile-nav-link,
    .mobile-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 12px 2px;
        border-bottom: 1px solid var(--line);
        color: var(--text);
        text-decoration: none;
        font-size: 14px;
        font-weight: 600;
        text-align: left;
    }
    .mobile-nav-link:last-child { border-bottom: 0; }
    .mobile-nav-toggle svg {
        width: 15px;
        height: 15px;
        fill: none;
        stroke: var(--text-muted);
        stroke-width: 1.8;
        stroke-linecap: round;
        transition: transform .2s ease;
    }
    .mobile-nav-group.is-open .mobile-nav-toggle svg { transform: rotate(180deg); }
    .mobile-nav-group.is-open .mobile-nav-toggle { color: var(--brand-ink); }

    .mobile-nav-panel {
        display: grid;
        overflow: hidden;
        max-height: 0;
        transition: max-height .25s ease;
    }
    .mobile-nav-group.is-open .mobile-nav-panel { max-height: 420px; }
    .mobile-nav-panel a {
        display: block;
        padding: 10px 2px 10px 14px;
        border-bottom: 1px solid var(--line);
        color: var(--text-soft);
        text-decoration: none;
        font-size: 13px;
    }
    .mobile-nav-panel a:last-child { border-bottom: 0; }
    .mobile-nav-panel a:hover { color: var(--brand-ink); }

    .hero { padding: 63px 0 25px; }
    .hero h1 { font-size: clamp(34px, 9vw, 46px); }
    .hero-copy { max-width: 440px; margin-top: 15px; font-size: 14px; }
    .hero-actions { margin-top: 22px; }
    .hero-actions .button { min-height: 44px; padding-inline: 14px; font-size: 13px; }
    .hero-dots { margin-top: 40px; padding-top: 18px; }

    .section { padding: 61px 0; }
    .steps-section { padding: 25px 0 0; }
    .steps-grid { grid-template-columns: 1fr; padding-bottom: 61px; }

    .section-heading { display: block; margin-bottom: 20px; }
    .section-heading h2 { font-size: 29px; }

    .product-grid { grid-template-columns: 1fr; gap: 12px; }
    .region-card { padding: 20px; }
    .region-card h3 { margin-top: 13px; }

    .capabilities { padding: 54px 0; }
    .capability-layout { grid-template-columns: 1fr; gap: 26px; }
    .capability-layout h2 { font-size: 30px; }
    .capability-list article { grid-template-columns: 34px 1fr; gap: 8px; }

    .contact-section { padding: 58px 0; }
    .contact-grid { grid-template-columns: 1fr; gap: 12px; }

    .site-footer { padding: 26px 0 18px; }
}

/* ------------------------------------------------- 16. 响应式：≤360px */
@media (max-width: 360px) {
    .container { width: calc(100% - 28px); }
    .brand-mark { width: 84px; height: 26px; }
    .header-actions { gap: 4px; }
    .header-actions .button-small { padding-inline: 8px; }
    .lang-toggle { min-width: 34px; padding: 0 6px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .button { width: 100%; }
    .step, .region-card, .contact-card { padding: 18px; }
}

/* ---------------------------------------------------- 17. 动效降级 */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
    .hero-slide { transform: none; }
}