/* ==========================================================================
   超导传媒官网 · 全局视觉系统
   ========================================================================== */

:root {
    --ink: #0a1020;
    --ink_2: #101a2e;
    --ink_3: #18243d;
    --paper: #f4f1ea;
    --paper_2: #ebe6dc;
    --white: #ffffff;
    --text: #111827;
    --muted: #667085;
    --line: rgba(17, 24, 39, .13);
    --line_soft: rgba(17, 24, 39, .07);
    --line_dark: rgba(255, 255, 255, .14);
    --accent: #2f5bff;
    --accent_deep: #1f43d6;
    --accent_light: #8ea8ff;
    --sand: #e6c9a8;
    --signal: #b8ff5c;
    --radius: 18px;
    --radius_sm: 12px;
    --max: 1280px;
    --gutter: clamp(20px, 4vw, 48px);
    --header_h: 76px;
    --font: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --serif: "Times New Roman", "Songti SC", STSong, serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

body.menu_open {
    overflow: hidden;
}

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

[hidden] {
    display: none !important;
}

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

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

button {
    cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote {
    margin: 0;
}

ul,
ol {
    margin: 0;
}

::selection {
    background: var(--accent);
    color: var(--white);
}

.section_dark ::selection,
.cta_band ::selection,
.site_footer ::selection {
    background: var(--white);
    color: var(--ink);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.skip_link {
    position: fixed;
    left: 16px;
    top: -100px;
    z-index: 300;
    padding: 10px 18px;
    background: var(--ink);
    color: var(--white);
    border-radius: 999px;
    font-size: 13px;
    transition: top .2s ease;
}

.skip_link:focus {
    top: 16px;
}

.wrap {
    width: min(calc(100% - var(--gutter) * 2), var(--max));
    margin-inline: auto;
}

.section {
    padding: clamp(72px, 9vw, 128px) 0;
}

.section_tight {
    padding: clamp(48px, 6vw, 88px) 0;
}

.section_dark {
    background: var(--ink);
    color: var(--white);
}

.section_white {
    background: var(--white);
}

.section_paper_2 {
    background: var(--paper_2);
}

.section_head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(32px, 6vw, 96px);
    align-items: end;
    margin-bottom: clamp(40px, 6vw, 72px);
}

.section_head h2 {
    font-size: clamp(26px, 3.4vw, 46px);
    line-height: 1.16;
    font-weight: 700;
    max-width: 13em;
}

.section_head .head_copy {
    max-width: 520px;
    justify-self: end;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.9;
}

.section_dark .section_head .head_copy,
.section_dark .eyebrow {
    color: rgba(255, 255, 255, .52);
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.4;
    color: var(--muted);
    margin-bottom: 18px;
}

.eyebrow::before {
    content: "";
    width: 34px;
    height: 1px;
    background: currentColor;
    opacity: .45;
}

.lead {
    color: var(--muted);
    font-size: clamp(15px, 1.3vw, 18px);
    line-height: 1.9;
}

.section_dark .lead {
    color: rgba(255, 255, 255, .6);
}

.mono {
    font-family: var(--mono);
}

.muted {
    color: var(--muted);
}

.nowrap {
    white-space: nowrap;
}

/* --------------------------------------------------------------------------
   头部导航
   -------------------------------------------------------------------------- */

.site_header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    height: var(--header_h);
    color: var(--white);
    border-bottom: 1px solid transparent;
    transition: background .35s ease, color .35s ease, border-color .35s ease, backdrop-filter .35s ease;
}

.site_header.is_solid {
    background: rgba(244, 241, 234, .9);
    color: var(--ink);
    border-bottom-color: var(--line);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

body.menu_open .site_header {
    background: transparent;
    color: var(--white);
    border-bottom-color: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
}

.header_inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
    flex-shrink: 0;
}

.brand_logo {
    width: auto;
    height: 22px;
    filter: brightness(0) invert(1);
    transition: filter .35s ease;
}

.site_header.is_solid .brand_logo {
    filter: none;
}

body.menu_open .brand_logo {
    filter: brightness(0) invert(1);
}

.brand_note {
    padding-left: 16px;
    border-left: 1px solid rgba(255, 255, 255, .22);
    color: rgba(255, 255, 255, .46);
    font-size: 11px;
    line-height: 1.5;
    transition: color .35s ease, border-color .35s ease;
}

.site_header.is_solid .brand_note {
    color: var(--muted);
    border-left-color: var(--line);
}

.main_nav {
    display: flex;
    align-items: center;
    gap: clamp(18px, 2vw, 32px);
    margin-left: auto;
}

.main_nav a {
    position: relative;
    padding: 6px 0;
    color: rgba(255, 255, 255, .7);
    font-size: 14px;
    line-height: 1.4;
    transition: color .25s ease;
}

.main_nav a:hover,
.main_nav a.is_active {
    color: var(--white);
}

.main_nav a.is_active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -2px;
    width: 4px;
    height: 4px;
    margin-left: -2px;
    border-radius: 50%;
    background: var(--signal);
}

.site_header.is_solid .main_nav a {
    color: var(--muted);
}

.site_header.is_solid .main_nav a:hover,
.site_header.is_solid .main_nav a.is_active {
    color: var(--ink);
}

.site_header.is_solid .main_nav a.is_active::after {
    background: var(--accent);
}

.header_cta {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    padding: 0 18px;
    border: 1px solid rgba(255, 255, 255, .35);
    border-radius: 999px;
    font-size: 13px;
    color: var(--white);
    transition: background .25s ease, color .25s ease, border-color .25s ease;
}

.header_cta:hover {
    background: var(--white);
    color: var(--ink);
    border-color: var(--white);
}

.site_header.is_solid .header_cta {
    border-color: var(--ink);
    color: var(--ink);
}

.site_header.is_solid .header_cta:hover {
    background: var(--ink);
    color: var(--white);
}

body.menu_open .header_cta {
    border-color: rgba(255, 255, 255, .35);
    color: var(--white);
}

.menu_toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 50%;
    background: transparent;
    color: inherit;
    position: relative;
    flex-shrink: 0;
}

.menu_toggle span {
    position: absolute;
    left: 12px;
    right: 12px;
    height: 1px;
    background: currentColor;
    transition: transform .3s ease, top .3s ease, opacity .3s ease;
}

.menu_toggle span:nth-child(1) {
    top: 16px;
}

.menu_toggle span:nth-child(2) {
    top: 21px;
}

.menu_toggle span:nth-child(3) {
    top: 26px;
}

.menu_toggle.is_open span:nth-child(1) {
    top: 21px;
    transform: rotate(45deg);
}

.menu_toggle.is_open span:nth-child(2) {
    opacity: 0;
}

.menu_toggle.is_open span:nth-child(3) {
    top: 21px;
    transform: rotate(-45deg);
}

.site_header.is_solid .menu_toggle {
    border-color: var(--line);
}

body.menu_open .menu_toggle {
    border-color: rgba(255, 255, 255, .28);
}

.mobile_menu {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: calc(var(--header_h) + 36px) var(--gutter) 36px;
    background: var(--ink);
    color: var(--white);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-24px);
    transition: opacity .35s ease, transform .35s ease, visibility .35s ease;
}

.mobile_menu.is_open {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.mobile_menu nav {
    display: flex;
    flex-direction: column;
}

.mobile_menu nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    font-size: clamp(18px, 5vw, 22px);
    font-weight: 700;
    line-height: 1.25;
}

.mobile_menu nav a span {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 400;
    color: rgba(255, 255, 255, .36);
}

.mobile_menu_meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    color: rgba(255, 255, 255, .5);
    font-size: 13px;
}

.mobile_menu_meta a:hover {
    color: var(--white);
}

/* --------------------------------------------------------------------------
   按钮与标签
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    transition: background .25s ease, color .25s ease, border-color .25s ease;
}

.btn svg {
    width: 17px;
    height: 17px;
    flex-shrink: 0;
}

.btn_primary {
    background: var(--accent);
    color: var(--white);
}

.btn_primary:hover {
    background: var(--accent_deep);
}

.btn_ghost {
    border-color: rgba(255, 255, 255, .32);
    color: var(--white);
    background: transparent;
}

.btn_ghost:hover {
    background: var(--white);
    color: var(--ink);
    border-color: var(--white);
}

.btn_dark {
    background: var(--ink);
    color: var(--white);
}

.btn_dark:hover {
    background: var(--accent);
}

.btn_white {
    background: var(--white);
    color: var(--ink);
}

.btn_white:hover {
    background: var(--sand);
}

.btn_small {
    min-height: 42px;
    padding: 0 20px;
    font-size: 13px;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 11px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1;
    white-space: nowrap;
}

.section_dark .tag {
    border-color: var(--line_dark);
    color: rgba(255, 255, 255, .56);
}

.tag_row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.arrow_circle {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 50%;
    color: var(--ink);
    transition: background .25s ease, color .25s ease, border-color .25s ease;
}

.arrow_circle svg {
    width: 16px;
    height: 16px;
}

/* --------------------------------------------------------------------------
   首页首屏
   -------------------------------------------------------------------------- */

.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    padding-top: calc(var(--header_h) + 48px);
    padding-bottom: 96px;
    background: var(--ink);
    color: var(--white);
}

.hero_flow {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: .92;
}

.hero_grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 80px 80px;
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .65), transparent 82%);
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .65), transparent 82%);
}

.hero_glow {
    position: absolute;
    top: -24vw;
    right: -18vw;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(47, 91, 255, .26), rgba(47, 91, 255, 0) 66%);
    filter: blur(10px);
    pointer-events: none;
}

.hero_content {
    position: relative;
    z-index: 2;
}

.hero_eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, .52);
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.5;
}

.hero_eyebrow .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 14px rgba(184, 255, 92, .8);
}

.hero h1 {
    max-width: 11em;
    margin: 24px 0 28px;
    font-size: clamp(42px, 7.4vw, 102px);
    font-weight: 700;
    line-height: 1.06;
}

.hero h1 .line {
    display: block;
}

.hero h1 .mark {
    position: relative;
    display: inline-block;
    color: var(--sand);
    white-space: nowrap;
}

.hero h1 .mark::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: .06em;
    height: 2px;
    background: var(--sand);
    opacity: .5;
}

.hero_sub {
    max-width: 620px;
    color: rgba(255, 255, 255, .64);
    font-size: clamp(15px, 1.3vw, 18px);
    line-height: 1.95;
}

.hero_actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 36px;
}

.hero_bottom {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 32px;
    align-items: end;
    margin-top: clamp(48px, 8vh, 96px);
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, .14);
}

.hero_stats {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(24px, 4vw, 64px);
}

.hero_stat strong {
    display: block;
    font-family: var(--serif);
    font-size: clamp(30px, 3vw, 44px);
    font-weight: 400;
    line-height: 1;
}

.hero_stat span {
    display: block;
    margin-top: 8px;
    color: rgba(255, 255, 255, .46);
    font-size: 12px;
}

.hero_location {
    color: rgba(255, 255, 255, .38);
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.7;
    text-align: right;
}

.hero > .wrap:last-child {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 24px;
    z-index: 2;
}

.hero_industries {
    position: relative;
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, .1);
}

.hero_industries span {
    padding: 12px 18px 0 0;
    margin-right: 18px;
    border-right: 1px solid rgba(255, 255, 255, .12);
    color: rgba(255, 255, 255, .42);
    font-size: 12px;
    line-height: 1.4;
}

.hero_industries span:last-child {
    border-right: 0;
    margin-right: 0;
    padding-right: 0;
}

/* --------------------------------------------------------------------------
   内页头图
   -------------------------------------------------------------------------- */

.page_hero {
    position: relative;
    overflow: hidden;
    padding: calc(var(--header_h) + clamp(56px, 8vw, 96px)) 0 clamp(52px, 7vw, 88px);
    background: var(--ink);
    color: var(--white);
}

.page_hero::after {
    content: "";
    position: absolute;
    top: -30%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(47, 91, 255, .2), rgba(47, 91, 255, 0) 68%);
    pointer-events: none;
}

.page_hero .page_number {
    position: absolute;
    right: -2vw;
    bottom: -.2em;
    z-index: 0;
    color: rgba(255, 255, 255, .035);
    font-family: var(--serif);
    font-size: clamp(180px, 28vw, 420px);
    line-height: .8;
    pointer-events: none;
}

.page_hero .wrap {
    position: relative;
    z-index: 1;
}

.page_hero h1 {
    max-width: 12em;
    margin: 18px 0 22px;
    font-size: clamp(42px, 6.2vw, 84px);
    font-weight: 700;
    line-height: 1.08;
}

.page_hero .lead {
    max-width: 700px;
    color: rgba(255, 255, 255, .62);
    font-size: clamp(15px, 1.4vw, 17px);
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, .4);
    font-size: 12px;
    line-height: 1.5;
}

.breadcrumb a {
    transition: color .2s ease;
}

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

.breadcrumb span[aria-current="page"] {
    color: rgba(255, 255, 255, .72);
}

.page_hero_actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

/* --------------------------------------------------------------------------
   首页服务索引
   -------------------------------------------------------------------------- */

.service_list {
    border-top: 1px solid var(--line);
}

.service_item {
    display: grid;
    grid-template-columns: 56px 1.05fr 1.25fr 44px;
    gap: clamp(16px, 3vw, 48px);
    align-items: center;
    padding: clamp(24px, 3.2vw, 40px) clamp(16px, 2.2vw, 32px);
    border-bottom: 1px solid var(--line);
    transition: background .3s ease;
}

.service_item:hover {
    background: rgba(255, 255, 255, .5);
}

.service_num {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 16px;
    line-height: 1;
}

.service_title {
    font-size: clamp(20px, 2.1vw, 30px);
    font-weight: 650;
    line-height: 1.35;
}

.service_title small {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 400;
}

.service_desc {
    max-width: 560px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.service_tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.service_item:hover .arrow_circle {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--white);
}

/* --------------------------------------------------------------------------
   能力纵深
   -------------------------------------------------------------------------- */

.capability_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.capability_card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 430px;
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, .035);
    overflow: hidden;
    transition: border-color .35s ease, background .35s ease;
}

.capability_card:hover {
    border-color: rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .055);
}

.capability_art {
    position: relative;
    height: 156px;
    margin-bottom: 28px;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.capability_art svg {
    width: 100%;
    height: 100%;
    display: block;
}

.capability_card h3 {
    margin-bottom: 12px;
    font-size: 24px;
    line-height: 1.35;
}

.capability_card p {
    color: rgba(255, 255, 255, .56);
    font-size: 14px;
    line-height: 1.9;
}

.capability_card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: auto;
    padding: 24px 0 0;
    list-style: none;
    color: rgba(255, 255, 255, .66);
    font-size: 13px;
    line-height: 1.6;
}

.capability_card li {
    position: relative;
    padding-left: 16px;
}

.capability_card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .65em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent_light);
}

/* --------------------------------------------------------------------------
   案例卡片
   -------------------------------------------------------------------------- */

.case_grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(20px, 3vw, 36px);
}

.case_card {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.case_card.is_hidden {
    display: none;
}

.case_visual {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--ink_2);
}

.case_visual svg {
    width: 100%;
    height: 100%;
    display: block;
}

.case_info {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: start;
    padding: 20px 4px 0;
}

.case_info h3 {
    font-size: clamp(20px, 2vw, 28px);
    font-weight: 650;
    line-height: 1.35;
}

.case_info p {
    max-width: 560px;
    margin-top: 12px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.case_index {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1.4;
}

.case_tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.case_link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--ink);
}

.case_link svg {
    width: 15px;
    height: 15px;
}

.filter_bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 36px;
}

.filter_btn {
    min-height: 38px;
    padding: 0 16px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-size: 13px;
    transition: background .25s ease, color .25s ease, border-color .25s ease;
}

.filter_btn:hover {
    border-color: var(--ink);
    color: var(--ink);
}

.filter_btn.is_active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--white);
}

.filter_count {
    margin-left: auto;
    align-self: center;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.4;
}

.case_note {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 13px;
    line-height: 1.8;
}

.project_index {
    border-top: 1px solid var(--line);
}

.project_group {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: clamp(20px, 4vw, 56px);
    padding: 30px 0;
    border-bottom: 1px solid var(--line);
}

.project_group h3 {
    font-size: 16px;
    font-weight: 650;
    line-height: 1.5;
}

.project_group h3 span {
    display: block;
    margin-top: 8px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 400;
    line-height: 1.4;
}

.project_items {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    align-content: flex-start;
    gap: 10px 12px;
}

.project_items span {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--text);
    font-size: 13px;
    line-height: 1.5;
    background: var(--white);
}

/* --------------------------------------------------------------------------
   合作流程
   -------------------------------------------------------------------------- */

.process_list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    border-top: 1px solid var(--line);
}

.process_item {
    position: relative;
    padding: 28px 24px 0 0;
}

.process_item::before {
    content: "";
    position: absolute;
    top: -4px;
    left: 0;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--paper);
}

.process_num {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1;
}

.process_item h3 {
    margin: 14px 0 10px;
    font-size: 18px;
    line-height: 1.4;
}

.process_item p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.85;
}

/* --------------------------------------------------------------------------
   观点与理由
   -------------------------------------------------------------------------- */

.statement_grid {
    display: grid;
    grid-template-columns: 1.16fr .84fr;
    gap: clamp(40px, 8vw, 120px);
    align-items: start;
}

.statement_grid h2 {
    font-size: clamp(30px, 4vw, 52px);
    font-weight: 700;
    line-height: 1.14;
    text-wrap: balance;
}

.reason_list {
    border-top: 1px solid var(--line);
}

.reason_item {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 16px;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
}

.reason_item .reason_num {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1.7;
}

.reason_item h3 {
    margin-bottom: 6px;
    font-size: 18px;
    line-height: 1.45;
}

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

.quote_block {
    margin-top: 40px;
    padding: 26px 0 0 24px;
    border-left: 2px solid var(--accent);
}

.quote_block p {
    font-size: clamp(20px, 2.2vw, 28px);
    line-height: 1.6;
    font-weight: 500;
}

.quote_block cite {
    display: block;
    margin-top: 16px;
    color: var(--muted);
    font-size: 13px;
    font-style: normal;
}

/* --------------------------------------------------------------------------
   CTA
   -------------------------------------------------------------------------- */

.cta_band {
    position: relative;
    overflow: hidden;
    padding: clamp(64px, 8vw, 112px) 0;
    background: var(--accent);
    color: var(--white);
}

.cta_band::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -8%;
    width: 60vw;
    height: 60vw;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 50%;
    pointer-events: none;
}

.cta_band::after {
    content: "";
    position: absolute;
    top: -22%;
    right: 4%;
    width: 36vw;
    height: 36vw;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 50%;
    pointer-events: none;
}

.cta_inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 48px;
    align-items: end;
}

.cta_inner h2 {
    max-width: 13em;
    font-size: clamp(32px, 5vw, 72px);
    font-weight: 700;
    line-height: 1.1;
}

.cta_inner p {
    max-width: 460px;
    margin-top: 22px;
    color: rgba(255, 255, 255, .72);
    font-size: 15px;
    line-height: 1.9;
}

.cta_actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 22px;
}

.cta_contact {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 24px;
    color: rgba(255, 255, 255, .8);
    font-size: 14px;
}

.cta_contact a:hover {
    color: var(--white);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */

.site_footer {
    padding: 64px 0 24px;
    background: var(--ink);
    color: var(--white);
}

.footer_top {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 64px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.footer_brand img {
    width: auto;
    height: 24px;
    filter: brightness(0) invert(1);
    margin-bottom: 22px;
}

.footer_brand p {
    max-width: 430px;
    color: rgba(255, 255, 255, .5);
    font-size: 14px;
    line-height: 1.9;
}

.footer_brand p+p {
    margin-top: 10px;
}

.footer_cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer_cols h3 {
    margin-bottom: 16px;
    color: rgba(255, 255, 255, .38);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
}

.footer_cols a,
.footer_cols p {
    display: block;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, .66);
    font-size: 13px;
    line-height: 1.7;
}

.footer_cols a:hover {
    color: var(--white);
}

.footer_bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 16px 24px;
    padding-top: 24px;
    color: rgba(255, 255, 255, .32);
    font-size: 12px;
    line-height: 1.7;
}

.footer_legal {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.footer_legal a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: inherit;
}

.footer_legal a:hover {
    color: rgba(255, 255, 255, .7);
}

.footer_legal img {
    width: 14px;
    height: auto;
    opacity: .55;
}

/* --------------------------------------------------------------------------
   服务能力页
   -------------------------------------------------------------------------- */

.services_layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: clamp(40px, 6vw, 88px);
}

.services_index {
    position: sticky;
    top: 110px;
    align-self: start;
    border-top: 1px solid var(--line);
}

.services_index a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
    transition: color .2s ease;
}

.services_index a span {
    font-family: var(--serif);
    font-size: 11px;
}

.services_index a:hover {
    color: var(--ink);
}

.service_section {
    padding: clamp(48px, 6vw, 76px) 0;
    border-top: 1px solid var(--line);
    scroll-margin-top: 110px;
}

.service_section:first-child {
    border-top: 0;
    padding-top: 0;
}

.service_section h2 {
    font-size: clamp(30px, 3.8vw, 48px);
    font-weight: 700;
    line-height: 1.2;
}

.service_section .service_lead {
    max-width: 720px;
    margin: 18px 0 28px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.95;
}

.service_columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(24px, 4vw, 48px);
}

.service_columns h3 {
    margin-bottom: 14px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}

.check_list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 0;
    list-style: none;
}

.check_list li {
    position: relative;
    padding-left: 20px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.85;
}

.check_list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .68em;
    width: 7px;
    height: 7px;
    border: 1px solid var(--accent);
    border-radius: 50%;
}

.service_footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--line_soft);
}

.service_footer .tag_row {
    flex: 1;
}

.service_footer .case_link {
    margin-top: 0;
}

.cooperation_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cooperation_card {
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.cooperation_card .mono {
    color: var(--accent);
    font-size: 11px;
}

.cooperation_card h3 {
    margin: 14px 0 10px;
    font-size: 20px;
    line-height: 1.4;
}

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

/* --------------------------------------------------------------------------
   常见问题
   -------------------------------------------------------------------------- */

.faq {
    border-top: 1px solid var(--line);
}

.faq_item {
    border-bottom: 1px solid var(--line);
}

.faq_item summary {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 0;
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.6;
    list-style: none;
}

.faq_item summary::-webkit-details-marker {
    display: none;
}

.faq_item summary::after {
    content: "+";
    flex-shrink: 0;
    color: var(--muted);
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 400;
    line-height: 1;
    transition: transform .25s ease;
}

.faq_item[open] summary::after {
    transform: rotate(45deg);
}

.faq_item p {
    max-width: 780px;
    padding: 0 0 24px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.95;
}

.faq_item p+p {
    padding-top: 0;
}

/* --------------------------------------------------------------------------
   行业解决方案页
   -------------------------------------------------------------------------- */

.solution_grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.solution_card {
    display: flex;
    flex-direction: column;
    min-height: 380px;
    padding: clamp(24px, 3vw, 36px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, .42);
    transition: border-color .3s ease, background .3s ease;
}

.solution_card:hover {
    border-color: var(--ink);
    background: var(--white);
}

.solution_top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.solution_top .solution_num {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1.5;
}

.solution_card h2 {
    margin: 18px 0 0;
    font-size: clamp(24px, 2.6vw, 32px);
    font-weight: 650;
    line-height: 1.3;
}

.solution_card .solution_desc {
    margin: 16px 0 24px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.solution_cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: auto;
}

.solution_cols h3 {
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
}

.solution_cols ul {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0;
    list-style: none;
    color: var(--text);
    font-size: 13px;
    line-height: 1.7;
}

.solution_cols li {
    position: relative;
    padding-left: 13px;
}

.solution_cols li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .7em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
}

.solution_footer {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid var(--line_soft);
}

.solution_footer .tag {
    font-size: 11px;
}

/* --------------------------------------------------------------------------
   技术底座页
   -------------------------------------------------------------------------- */

.stack_table {
    border-top: 1px solid var(--line);
}

.stack_row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 32px;
    padding: 26px 0;
    border-bottom: 1px solid var(--line);
}

.stack_row h3 {
    font-size: 16px;
    line-height: 1.5;
}

.stack_row h3 span {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 400;
}

.stack_items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.stack_items span {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.4;
    background: rgba(255, 255, 255, .4);
}

.principle_grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.principle_card {
    padding: clamp(24px, 3vw, 32px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.principle_card .principle_num {
    color: var(--accent);
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1;
}

.principle_card h3 {
    margin: 18px 0 12px;
    font-size: 20px;
    line-height: 1.4;
}

.principle_card p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.tech_split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(32px, 6vw, 80px);
    align-items: center;
}

.tech_split+.tech_split {
    margin-top: clamp(56px, 7vw, 96px);
}

.tech_split.is_reverse .tech_visual {
    order: 2;
}

.tech_visual {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border: 1px solid var(--line_dark);
    border-radius: var(--radius);
    background: var(--ink);
}

.tech_visual svg {
    width: 100%;
    height: 100%;
    display: block;
}

.tech_copy h2 {
    font-size: clamp(28px, 3.6vw, 46px);
    font-weight: 700;
    line-height: 1.2;
}

.tech_copy h2+p {
    margin-top: 16px;
}

.tech_copy .check_list {
    margin-top: 24px;
}

.section_dark .check_list li {
    color: rgba(255, 255, 255, .62);
}

.section_dark .check_list li::before {
    border-color: var(--accent_light);
}

.infra_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.infra_card {
    padding: 24px;
    border-top: 2px solid var(--ink);
    background: rgba(255, 255, 255, .35);
}

.infra_card h3 {
    margin-bottom: 10px;
    font-size: 18px;
    line-height: 1.4;
}

.infra_card p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.85;
}

/* --------------------------------------------------------------------------
   关于我们页
   -------------------------------------------------------------------------- */

.about_story {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: clamp(32px, 6vw, 88px);
    align-items: start;
}

.about_story h2 {
    font-size: clamp(32px, 4.4vw, 58px);
    font-weight: 700;
    line-height: 1.15;
}

.about_copy p {
    margin-bottom: 20px;
    color: var(--muted);
    font-size: 16px;
    line-height: 2;
}

.about_copy p:first-child {
    color: var(--text);
    font-size: 20px;
    line-height: 1.9;
}

.values_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.value_card {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.value_card .value_num {
    color: var(--muted);
    font-family: var(--serif);
    font-size: 13px;
    line-height: 1;
}

.value_card h3 {
    margin: 18px 0 10px;
    font-size: 21px;
    line-height: 1.4;
}

.value_card p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.evolution_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.evolution_item {
    padding: 28px;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, .035);
}

.evolution_item .evolution_label {
    color: var(--accent_light);
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.4;
}

.evolution_item h3 {
    margin: 18px 0 10px;
    font-size: 21px;
    line-height: 1.4;
}

.evolution_item p {
    color: rgba(255, 255, 255, .56);
    font-size: 14px;
    line-height: 1.9;
}

.team_grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: clamp(32px, 6vw, 80px);
    align-items: start;
}

.team_quote {
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.team_quote p {
    font-size: clamp(20px, 2.3vw, 28px);
    font-weight: 500;
    line-height: 1.65;
}

.team_quote cite {
    display: block;
    margin-top: 20px;
    color: var(--muted);
    font-size: 13px;
    font-style: normal;
}

.team_stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.team_stat {
    padding: 24px;
    border-top: 1px solid var(--line);
}

.team_stat strong {
    display: block;
    font-family: var(--serif);
    font-size: 38px;
    font-weight: 400;
    line-height: 1;
}

.team_stat span {
    display: block;
    margin-top: 10px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.belief {
    padding: clamp(72px, 9vw, 120px) 0;
    background: var(--ink);
    color: var(--white);
}

.belief blockquote {
    max-width: 1000px;
    font-size: clamp(28px, 4.2vw, 56px);
    font-weight: 500;
    line-height: 1.45;
}

.belief blockquote span {
    color: var(--sand);
}

.belief cite {
    display: block;
    margin-top: 32px;
    color: rgba(255, 255, 255, .4);
    font-size: 13px;
    font-style: normal;
}

/* --------------------------------------------------------------------------
   联系我们页
   -------------------------------------------------------------------------- */

.contact_grid {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: clamp(32px, 6vw, 80px);
    align-items: start;
}

.contact_list {
    border-top: 1px solid var(--line);
}

.contact_item {
    display: grid;
    grid-template-columns: 84px 1fr;
    gap: 20px;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.contact_item .contact_label {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.8;
}

.contact_item a,
.contact_item p {
    font-size: 16px;
    line-height: 1.8;
    word-break: break-word;
}

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

.contact_item .contact_sub {
    display: block;
    margin-top: 8px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.7;
}

.qr_card {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 28px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.qr_card img {
    width: 116px;
    height: 116px;
    object-fit: contain;
}

.qr_card h3 {
    margin-bottom: 8px;
    font-size: 16px;
    line-height: 1.4;
}

.qr_card p {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.7;
}

.contact_form {
    padding: clamp(24px, 4vw, 40px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
}

.contact_form h2 {
    margin-bottom: 8px;
    font-size: 26px;
    line-height: 1.35;
}

.contact_form .form_intro {
    margin-bottom: 24px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.8;
}

.form_row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.field label {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.4;
}

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--paper);
    font-size: 14px;
    line-height: 1.5;
    outline: none;
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.field select {
    appearance: none;
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
    background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
}

.field textarea {
    min-height: 120px;
    resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(47, 91, 255, .1);
}

.form_note {
    margin-top: 12px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.7;
}

.form_honeypot {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

.contact_form button[type="submit"]:disabled {
    opacity: .55;
    cursor: default;
}

.form_status {
    min-height: 1.6em;
    margin-top: 12px;
    color: var(--accent);
    font-size: 13px;
    line-height: 1.6;
}

.copy_btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--muted);
    font-size: 12px;
}

.copy_btn:hover {
    color: var(--accent);
}

.contact_map_link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    color: var(--accent);
    font-size: 12px;
}

.contact_map_link svg {
    width: 14px;
    height: 14px;
}

/* --------------------------------------------------------------------------
   案例详情页
   -------------------------------------------------------------------------- */

.case_hero {
    padding-bottom: clamp(56px, 7vw, 88px);
}

.case_hero h1 {
    max-width: 13em;
    font-size: clamp(40px, 5.6vw, 76px);
}

.case_meta {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: clamp(32px, 5vw, 56px);
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, .15);
}

.case_meta span {
    display: block;
    margin-bottom: 6px;
    color: rgba(255, 255, 255, .38);
    font-size: 11px;
    line-height: 1.4;
}

.case_meta strong {
    display: block;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.6;
}

.case_showcase {
    padding: 0 0 20px;
    background: var(--paper);
}

.case_showcase .wrap {
    position: relative;
    z-index: 2;
    margin-top: -36px;
}

.case_visual_large {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--ink);
    aspect-ratio: 16 / 8.4;
}

.case_visual_large svg {
    width: 100%;
    height: 100%;
    display: block;
}

.case_caption {
    padding-top: 12px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.6;
    text-align: right;
}

.case_body {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: clamp(32px, 6vw, 80px);
    padding: clamp(48px, 7vw, 96px) 0;
}

.case_toc {
    position: sticky;
    top: 110px;
    align-self: start;
    border-top: 1px solid var(--line);
}

.case_toc a {
    display: block;
    padding: 11px 0;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
    transition: color .2s ease, padding .2s ease;
}

.case_toc a:hover {
    padding-left: 5px;
    color: var(--ink);
}

.case_content {
    max-width: 800px;
}

.case_content section {
    scroll-margin-top: 110px;
}

.case_content h2 {
    margin: 52px 0 18px;
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 700;
    line-height: 1.3;
}

.case_content h2:first-child {
    margin-top: 0;
}

.case_content h3 {
    margin: 30px 0 10px;
    font-size: 19px;
    line-height: 1.5;
}

.case_content p {
    margin-bottom: 18px;
    color: var(--muted);
    font-size: 15px;
    line-height: 2;
}

.case_content p:last-child {
    margin-bottom: 0;
}

.case_content ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 18px 0 24px;
    padding: 0;
    list-style: none;
}

.case_content ul li {
    position: relative;
    padding-left: 20px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.95;
}

.case_content ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .75em;
    width: 7px;
    height: 7px;
    border: 1px solid var(--accent);
    border-radius: 50%;
}

.case_callout {
    margin: 30px 0;
    padding: 20px 0 20px 24px;
    border-left: 2px solid var(--accent);
    color: var(--ink);
    font-size: clamp(18px, 1.8vw, 22px);
    line-height: 1.75;
}

.case_tech_grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 24px 0;
}

.case_tech_grid div {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius_sm);
    background: var(--white);
}

.case_tech_grid strong {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    line-height: 1.5;
}

.case_tech_grid span {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.75;
}

.case_disclaimer {
    margin-top: 40px;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius_sm);
    color: var(--muted);
    font-size: 12px;
    line-height: 1.8;
}

.case_next {
    padding: clamp(48px, 6vw, 80px) 0;
    background: var(--ink);
    color: var(--white);
}

.case_next a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    font-size: clamp(24px, 3.6vw, 42px);
    font-weight: 650;
    line-height: 1.35;
}

.case_next a svg {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    transition: transform .25s ease;
}

.case_next a:hover svg {
    transform: translateX(6px);
}

.case_next .case_next_label {
    display: block;
    margin-bottom: 14px;
    color: rgba(255, 255, 255, .4);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 400;
    line-height: 1.4;
}

/* --------------------------------------------------------------------------
   404
   -------------------------------------------------------------------------- */

.error_page {
    min-height: 100svh;
    display: grid;
    place-items: center;
    padding: 120px 0;
    background: var(--ink);
    color: var(--white);
}

.error_code {
    color: rgba(255, 255, 255, .08);
    font-family: var(--serif);
    font-size: clamp(120px, 22vw, 280px);
    line-height: .8;
}

.error_page h1 {
    margin: 24px 0 16px;
    font-size: clamp(36px, 5vw, 64px);
    line-height: 1.15;
}

.error_page p {
    max-width: 520px;
    color: rgba(255, 255, 255, .55);
    font-size: 15px;
    line-height: 1.9;
}

.error_links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

/* --------------------------------------------------------------------------
   入场动画
   -------------------------------------------------------------------------- */

[data_reveal] {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity .7s ease, transform .7s cubic-bezier(.2, .8, .2, 1);
}

[data_reveal].is_visible {
    opacity: 1;
    transform: none;
}

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
    .main_nav {
        gap: 18px;
    }

    .brand_note {
        display: none;
    }

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

    .capability_card:last-child {
        grid-column: span 2;
        min-height: 320px;
    }

    .capability_card:last-child .capability_art {
        height: 120px;
    }

    .footer_top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .cta_inner {
        grid-template-columns: 1fr;
        gap: 28px;
    }

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

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

    .case_toc {
        display: none;
    }

    .case_content {
        max-width: none;
    }

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

    .tech_split.is_reverse .tech_visual {
        order: 0;
    }

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

    .about_story h2 {
        position: static;
    }

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

    .statement_grid h2 {
        position: static;
    }

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

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

    .services_index {
        display: none;
    }

    .service_section:first-child {
        padding-top: 0;
    }
}

@media (max-width: 860px) {
    :root {
        --header_h: 68px;
    }

    .main_nav,
    .header_cta {
        display: none;
    }

    .menu_toggle {
        display: block;
    }

    .header_inner {
        justify-content: space-between;
    }

    .brand_logo {
        height: 20px;
    }

    .section_head {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .section_head .head_copy {
        justify-self: start;
    }

    .service_item {
        grid-template-columns: 40px 1fr 38px;
        gap: 14px;
        align-items: start;
    }

    .service_item > div:not(.service_title) {
        grid-column: 2 / -1;
        grid-row: 2;
    }

    .service_item .arrow_circle {
        grid-column: 3;
        grid-row: 1;
        align-self: start;
    }

    .service_num {
        grid-row: 1;
        padding-top: 5px;
    }

    .service_title {
        grid-column: 2;
        grid-row: 1;
    }

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

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

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

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

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

    .process_list {
        grid-template-columns: 1fr;
        border-top: 0;
        border-left: 1px solid var(--line);
        margin-left: 4px;
    }

    .process_item {
        padding: 0 0 32px 28px;
    }

    .process_item::before {
        top: 6px;
        left: -4px;
    }

    .process_item:last-child {
        padding-bottom: 0;
    }

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

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

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

    .stack_row {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .hero_bottom {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .hero_location {
        text-align: left;
    }

    .hero_industries span {
        padding-top: 10px;
        margin-right: 12px;
    }

    .page_hero .page_number {
        font-size: clamp(140px, 34vw, 260px);
    }

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

    .project_group {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .filter_count {
        margin-left: 0;
        width: 100%;
    }

    .case_next a {
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    :root {
        --gutter: 20px;
        --radius: 14px;
    }

    body {
        font-size: 15px;
    }

    .hero {
        min-height: 100svh;
        padding-top: calc(var(--header_h) + 24px);
        padding-bottom: 20px;
    }

    .hero h1 {
        margin: 20px 0 22px;
        font-size: clamp(30px, 9.4vw, 48px);
    }

    .hero_sub {
        font-size: 14px;
        line-height: 1.9;
    }

    .hero_actions {
        margin-top: 26px;
    }

    .hero_actions .btn {
        flex: 1;
        min-width: 0;
        padding: 0 16px;
    }

    .hero_bottom {
        margin-top: 40px;
        padding-top: 18px;
    }

    .hero_stats {
        gap: 20px;
    }

    .hero_stat strong {
        font-size: 28px;
    }

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

    .hero_industries {
        display: none;
    }

    .hero_location {
        display: none;
    }

    .page_hero {
        padding-top: calc(var(--header_h) + 48px);
        padding-bottom: 48px;
    }

    .page_hero h1 {
        font-size: clamp(36px, 10.5vw, 52px);
    }

    .breadcrumb {
        margin-bottom: 18px;
    }

    .section {
        padding: 64px 0;
    }

    .section_tight {
        padding: 44px 0;
    }

    .section_head {
        margin-bottom: 36px;
    }

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

    .capability_card {
        min-height: 0;
    }

    .capability_card:last-child {
        grid-column: auto;
    }

    .capability_card ul {
        margin-top: 20px;
    }

    .case_info {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .case_index {
        order: -1;
    }

    .cta_inner h2 {
        font-size: clamp(32px, 9.5vw, 46px);
    }

    .cta_actions .btn {
        flex: 1;
    }

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

    .footer_bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .contact_item {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .qr_card {
        align-items: flex-start;
    }

    .form_row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .case_meta {
        grid-template-columns: 1fr;
        gap: 16px;
    }

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

    .case_showcase .wrap {
        margin-top: -24px;
    }

    .case_visual_large {
        aspect-ratio: 4 / 3;
    }

    .case_next a {
        font-size: 24px;
    }

    .case_next a svg {
        width: 26px;
        height: 26px;
    }

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

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

    .solution_card {
        min-height: 0;
    }

    .mobile_menu nav a {
        font-size: 18px;
        padding: 13px 0;
    }

    .service_footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .service_footer .case_link {
        margin-top: 0;
    }
}

@media (max-width: 380px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero_stats {
        gap: 14px;
    }

    .hero_stat strong {
        font-size: 24px;
    }
}

/* --------------------------------------------------------------------------
   动效偏好与打印
   -------------------------------------------------------------------------- */

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

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

    [data_reveal] {
        opacity: 1;
        transform: none;
    }
}

@media print {

    .site_header,
    .mobile_menu,
    .hero_flow,
    .cta_band,
    .site_footer,
    .menu_toggle {
        display: none !important;
    }

    body {
        background: #fff;
    }

    .page_hero {
        background: #fff;
        color: #000;
        padding: 24px 0;
    }

    .page_hero .lead,
    .breadcrumb {
        color: #444;
    }
}

/* --------------------------------------------------------------------------
   团队页
   -------------------------------------------------------------------------- */

.team_roster {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(16px, 2vw, 24px);
}

.team_card {
    display: flex;
    flex-direction: column;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}

.team_avatar {
    position: relative;
    aspect-ratio: 3 / 2;
    background: var(--ink);
    color: var(--tone, var(--signal));
    overflow: hidden;
}

.team_avatar svg {
    display: block;
    width: 100%;
    height: 100%;
}

.team_avatar::after {
    content: "";
    position: absolute;
    inset: auto -30% -62% -30%;
    height: 120%;
    background: radial-gradient(circle at 50% 0, currentColor, transparent 62%);
    opacity: .14;
    pointer-events: none;
}

.team_body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: clamp(20px, 2.4vw, 28px);
}

.team_name {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.35;
}

.team_role {
    display: block;
    margin-top: 7px;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.5;
}

.team_bio {
    margin-top: 14px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

.team_tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
    padding-top: 18px;
}

.team_ways {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(20px, 3vw, 44px);
}

.team_way {
    border-top: 2px solid var(--ink);
    padding-top: 22px;
}

.team_way_num {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.4;
}

.team_way h3 {
    margin-top: 12px;
    font-size: 18px;
    font-weight: 650;
    line-height: 1.4;
}

.team_way p {
    margin-top: 10px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
}

@media (max-width: 1080px) {
    .team_roster {
        grid-template-columns: repeat(2, 1fr);
    }

    .team_ways {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
    }
}

@media (max-width: 640px) {
    .team_roster {
        grid-template-columns: 1fr;
    }

    .team_ways {
        grid-template-columns: 1fr;
        row-gap: 26px;
    }
}