:root {
  /* 全站设计变量：改主色、纸张底色、最大宽度优先改这里。 */
  --ink: #080a10;
  --ink-2: #10131b;
  --paper: #f3f0e8;
  --paper-2: #ebe8df;
  --white: #ffffff;
  --muted: #a9acb8;
  --text: #151821;
  --line: rgba(255, 255, 255, 0.18);
  --line-dark: rgba(8, 10, 16, 0.14);
  --red: #ff5546;
  --blue: #667cff;
  --cyan: #22b8ad;
  --gold: #c79636;
  --max: 1320px;
}

* {
  box-sizing: border-box;
}

/* 基础排版：中文优先使用系统黑体，避免额外字体依赖影响上线。 */
html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.7;
}

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

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

/* 固定导航：默认适配深色首屏，滚动后由 JS 增加 .is-scrolled。 */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: 220px 1fr 150px;
  align-items: center;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px 28px;
  color: var(--white);
  mix-blend-mode: normal;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    padding 0.2s ease;
}

.site-header.is-scrolled {
  color: var(--white);
  background: rgba(8, 10, 16, 0.9);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled .header-cta {
  background: var(--red);
  color: var(--white);
}

/* 文字版 Logo：避免白底 logo 图片在深色导航上出现白块。 */
.brand {
  display: inline-flex;
  align-items: center;
  width: auto;
  height: auto;
}

.brand-logo {
  display: block;
  width: 152px;
  height: auto;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
}

.brand-text {
  display: grid;
  gap: 1px;
  line-height: 1;
}

.brand-text strong {
  font-size: 22px;
  font-weight: 950;
  letter-spacing: 0;
}

.brand-text em {
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.erp-brand {
  display: block;
  width: 132px;
  margin: 0 0 20px;
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: clamp(28px, 4vw, 56px);
  font-size: 15px;
  font-weight: 700;
}

.main-nav a {
  opacity: 0.88;
}

.main-nav a:hover {
  opacity: 1;
  color: var(--red);
}

.header-cta,
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 56px;
  padding: 0 28px;
  font-weight: 800;
}

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

.btn-primary {
  background: var(--red);
  color: var(--white);
}

.btn-link,
.text-arrow {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  width: fit-content;
  padding-bottom: 11px;
  border-bottom: 1px solid currentColor;
  font-weight: 800;
}

.nav-toggle {
  display: none;
}

/* 深色区块通用背景：首屏、包装区、联系区都复用这个基调。 */
.section-dark {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 45%, rgba(54, 73, 223, 0.5), transparent 28%),
    radial-gradient(circle at 61% 76%, rgba(208, 62, 48, 0.42), transparent 24%),
    linear-gradient(120deg, #090b11 0%, #10131b 62%, #080a10 100%);
}

main section,
footer,
.project-cta {
  scroll-margin-top: 96px;
}

/* 首屏 Hero：ERP 转化核心区域，右侧业务卡片保持四业务并行。 */
.hero {
  min-height: 820px;
  padding: 128px 0 0;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: 28px;
}

.section,
.intro-band {
  width: 100%;
  max-width: none;
  margin: 0;
  padding-inline: max(28px, calc((100vw - var(--max)) / 2 + 28px));
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(520px, 0.92fr);
  gap: clamp(48px, 6vw, 92px);
  align-items: center;
  min-height: 692px;
}

.eyebrow,
.section-label {
  margin: 0 0 32px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-block;
  width: 38px;
  height: 2px;
  margin-right: 18px;
  vertical-align: middle;
  background: var(--red);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(58px, 6.5vw, 106px);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 950;
}

.hero h1 strong {
  display: block;
  width: fit-content;
  color: var(--red);
  font-family: "KaiTi", "STKaiti", "FangSong", serif;
  font-size: 0.93em;
  font-weight: 500;
  line-height: 1.05;
  transform: rotate(-2deg);
  border-bottom: 5px solid var(--red);
}

.hero-desc {
  max-width: 650px;
  margin: 34px 0 18px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.keyword-line {
  display: inline-flex;
  max-width: 100%;
  margin: 0 0 38px;
  padding: 11px 18px;
  color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 14px;
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 34px;
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.business-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 178px;
  padding: 30px 34px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
  backdrop-filter: blur(20px);
}

.business-card.featured {
  border-color: rgba(255, 85, 70, 0.78);
  box-shadow: 0 0 48px rgba(255, 85, 70, 0.14);
}

.business-card .number {
  color: var(--red);
  font-weight: 900;
}

.business-card strong {
  margin-top: 24px;
  font-size: clamp(28px, 2.6vw, 38px);
  line-height: 1.1;
}

.business-card em {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.52);
  font-style: normal;
  font-weight: 700;
}

.business-card .arrow {
  position: absolute;
  right: 28px;
  bottom: 24px;
  font-size: 22px;
}

.business-card:hover {
  border-color: rgba(255, 85, 70, 0.9);
  background: rgba(255, 85, 70, 0.16);
  transform: translateY(-4px);
}

.scroll-hint {
  display: none;
}

/* 公司简介区：浅色编辑感版式。 */
.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(360px, 0.72fr);
  gap: clamp(42px, 6vw, 96px);
  padding-top: 40px;
  padding-bottom: 40px;
  background: var(--paper);
}

.section-label {
  color: #68707a;
}

.intro-band h2,
.section-heading h2,
.split-copy h2 {
  margin: 0;
  font-size: clamp(44px, 5vw, 82px);
  line-height: 1.16;
  letter-spacing: 0;
  font-weight: 950;
}

.intro-band h2 {
  font-size: clamp(44px, 4.6vw, 76px);
}

.intro-band h2 span {
  color: var(--blue);
  font-family: "KaiTi", "STKaiti", "FangSong", serif;
  font-weight: 500;
}

.about-copy {
  align-self: center;
  max-width: 620px;
  color: #3d434d;
  font-size: 18px;
}

.section {
  padding-top: 40px;
  padding-bottom: 40px;
}

/* 通用区块标题：多数内容区共用，保持大标题和说明文案的视觉节奏。 */
.section-light {
  background: var(--paper);
}

.section-cream {
  background: var(--paper-2);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.65fr);
  gap: 80px;
  align-items: end;
  margin-bottom: 28px;
}

.section-heading.compact {
  display: block;
  max-width: 920px;
}

.section-heading p:not(.section-label) {
  margin: 0;
  color: #555b64;
  font-size: 17px;
}

.award-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 44px;
  align-items: stretch;
}

.award-photo {
  margin: 0;
}

.award-photo img,
.split-media img,
.equipment-layout img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}

.award-photo figcaption {
  margin-top: 14px;
  color: #555b64;
  font-size: 14px;
}

.strength-tags {
  display: grid;
  gap: 14px;
  align-content: start;
}

.strength-tags span,
.erp-points div,
.equipment-list div,
.contact-grid div {
  border-top: 1px solid var(--line-dark);
  padding-top: 20px;
}

.strength-tags span {
  font-size: 20px;
  font-weight: 900;
}

/* ERP 卖点网格：当前为 4 个卖点，平板变 2 列，手机变 1 列。 */
.erp-points {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  margin-top: 28px;
}

.erp-points strong,
.equipment-list strong,
.contact-grid span {
  display: block;
  margin-bottom: 8px;
  font-size: 24px;
  line-height: 1.25;
}

.erp-points span,
.equipment-list span {
  color: #5f6570;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.split-copy p:not(.section-label) {
  color: rgba(255, 255, 255, 0.72);
  font-size: 17px;
}

.split-media {
  min-height: 420px;
  margin: 0;
  overflow: hidden;
}

#strength .section-heading {
  align-items: stretch;
}

#strength .section-heading .section-label {
  grid-column: 1;
  grid-row: 1;
  align-self: start;
}

#strength .section-heading h2 {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  margin: 0;
}

#strength .section-heading > p:not(.section-label) {
  grid-column: 1;
  grid-row: 2;
  align-self: end;
}

.equipment-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 0.7fr);
  gap: 46px;
  align-items: start;
}

.equipment-layout figure {
  position: sticky;
  top: 96px;
  margin: 0;
}

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

.equipment-list strong {
  font-size: 20px;
}

/* 四种专业能力：用户要求保留的横向清单样式。 */
.capability-list,
.contact-grid {
  display: grid;
  border-top: 1px solid var(--line-dark);
}

.capability-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: clamp(42px, 8vw, 120px);
  align-items: end;
  margin-bottom: 28px;
}

.capability-heading h2 {
  margin: 0;
  font-size: clamp(54px, 6vw, 96px);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 950;
}

.capability-heading p {
  margin: 0;
  color: #555b64;
}

.capability-list {
  display: block;
}

.capability-row {
  display: grid;
  grid-template-columns: 56px minmax(220px, 0.9fr) minmax(280px, 1fr) minmax(190px, 0.45fr) 52px;
  gap: clamp(24px, 4vw, 68px);
  align-items: center;
  min-height: 150px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line-dark);
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s ease,
    transform 0.55s ease,
    color 0.25s ease,
    background-color 0.25s ease,
    border-color 0.25s ease;
  transition-delay: var(--row-delay, 0ms);
}

.capability-row.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.capability-row:hover {
  color: var(--white);
  background: var(--red);
  border-color: transparent;
  transform: translateY(-2px);
}

.capability-row:hover .cap-number,
.capability-row:hover .cap-title em,
.capability-row:hover .cap-title p,
.capability-row:hover .cap-copy {
  color: rgba(255, 255, 255, 0.82);
}

.capability-row:hover .cap-title h3,
.capability-row:hover .capability-list ul {
  color: var(--white);
}

.capability-row:hover .capability-list ul {
  border-left-color: rgba(255, 255, 255, 0.85);
}

.capability-row::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(8, 10, 16, 0.24), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.capability-row {
  position: relative;
}

.capability-row[data-accent="blue"] {
  --accent: var(--blue);
}

.capability-row[data-accent="red"] {
  --accent: var(--red);
}

.capability-row[data-accent="green"] {
  --accent: #1fa97d;
}

.capability-row[data-accent="purple"] {
  --accent: #8b6cff;
}

.capability-row:hover::after {
  opacity: 1;
}

.cap-number {
  color: #6b7078;
  font-size: 15px;
}

.cap-title em {
  display: block;
  margin-bottom: 8px;
  color: #8b9098;
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
  letter-spacing: 0.18em;
}

.cap-title h3 {
  margin: 0 0 8px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.12;
}

.cap-title p,
.cap-copy {
  margin: 0;
  color: #555b64;
}

.cap-copy {
  max-width: 520px;
}

.capability-list ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0 0 0 14px;
  border-left: 2px solid var(--accent, var(--blue));
  list-style: none;
  font-size: 14px;
  font-weight: 800;
}

/* 联系区：深色背景，用于承接门店/厂区/热线。 */
.contact-section {
  width: 100%;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

.contact-section .section-heading h2 {
  color: var(--white);
}

.contact-section .section-heading p:not(.section-label) {
  color: rgba(255, 255, 255, 0.72);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
  margin-bottom: 28px;
}

.contact-layout .section-heading {
  display: block;
  margin: 0;
}

.contact-photo {
  min-height: 300px;
  margin: 0;
  overflow: hidden;
}

.contact-photo img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
}

.contact-grid {
  grid-template-columns: 1fr 1fr 0.72fr;
  gap: 34px;
  border-top-color: var(--line);
}

.contact-grid div {
  border-top-color: var(--line);
}

.contact-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 17px;
}

.contact-grid span {
  color: var(--red);
  font-size: 17px;
}

.contact-details-bottom {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0 max(28px, calc((100vw - var(--max)) / 2 + 28px)) 40px;
}

/* 最终 CTA：橙色大区块，放在获奖背书之后，目标是引导咨询。 */
.project-cta {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(420px, 0.88fr);
  gap: clamp(44px, 8vw, 120px);
  max-width: none;
  margin: 0;
  padding: 44px max(28px, calc((100vw - var(--max)) / 2 + 28px));
  color: var(--ink);
  background: var(--red);
}

.project-cta .section-label {
  color: rgba(8, 10, 16, 0.8);
}

.project-cta h2 {
  margin: 0;
  font-size: clamp(50px, 5.1vw, 82px);
  line-height: 1.1;
  letter-spacing: 0;
  font-weight: 950;
}

.project-contact {
  align-self: center;
}

.project-contact p {
  max-width: 620px;
  margin: 0 0 32px;
  font-size: 18px;
}

.project-contact a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  margin-bottom: 22px;
  padding: 0 24px;
  color: var(--white);
  background: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.project-contact small {
  font-size: 13px;
  font-weight: 700;
}

/* 页脚：公司、备案、底部导航。 */
.site-footer {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  gap: 32px;
  max-width: none;
  margin: 0;
  padding-inline: max(28px, calc((100vw - var(--max)) / 2 + 28px));
  padding-top: 54px;
  padding-bottom: 54px;
  color: rgba(255, 255, 255, 0.66);
  background: var(--ink);
}

.site-footer p {
  margin: 0;
  text-align: center;
  font-size: 13px;
}

.site-footer .brand {
  color: var(--white);
}

.site-footer nav {
  display: flex;
  gap: 28px;
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
}

/* 平板布局：主要把双栏/多栏内容收成单栏或两栏。 */
@media (max-width: 1024px) {
  .site-header {
    grid-template-columns: 160px 1fr 130px;
    padding: 22px;
  }

  .hero-inner,
  .intro-band,
  .section-heading,
  .contact-layout,
  .capability-heading,
  .award-layout,
  .split-section,
  .equipment-layout,
  .project-cta,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 110px;
  }

  .hero-inner {
    min-height: auto;
    padding-bottom: 82px;
  }

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

  .equipment-layout figure {
    position: static;
  }

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

  .capability-row {
    grid-template-columns: 46px minmax(200px, 0.8fr) minmax(300px, 1fr) 52px;
  }

  .capability-list ul {
    grid-column: 3 / 4;
  }

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

  .project-cta {
    padding-inline: 28px;
  }

  .site-footer {
    text-align: left;
  }

  .site-footer p {
    text-align: left;
  }
}

/* 手机布局：控制首屏字号、按钮、业务卡片、能力清单和底部 CTA 的断行。 */
@media (max-width: 720px) {
  .site-header {
    grid-template-columns: 1fr auto;
    padding: 18px 18px;
  }

  .brand {
    gap: 0;
  }

  .brand-logo {
    width: 128px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 18px;
  }

  .brand-text strong {
    font-size: 19px;
  }

  .brand-text em {
    font-size: 9px;
  }

  .nav-toggle {
    display: inline-grid;
    gap: 7px;
    width: 44px;
    height: 44px;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-toggle span {
    display: block;
    height: 2px;
    background: var(--white);
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    background: rgba(8, 10, 16, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.16);
  }

  .nav-open .main-nav {
    display: flex;
  }

  .main-nav a {
    padding: 14px 10px;
  }

  .header-cta {
    display: none;
  }

  .hero-inner,
  .section,
  .intro-band {
    padding-inline: 18px;
  }

  .hero {
    padding-top: 92px;
  }

  .hero-inner {
    gap: 42px;
    padding-bottom: 62px;
  }

  .eyebrow,
  .section-label {
    margin-bottom: 22px;
    font-size: 11px;
    letter-spacing: 0.13em;
  }

  .eyebrow span {
    width: 26px;
    margin-right: 10px;
  }

  .hero h1 {
    font-size: clamp(45px, 15vw, 68px);
  }

  .hero h1 strong {
    border-bottom-width: 3px;
  }

  .hero-desc {
    margin-top: 26px;
    font-size: 16px;
  }

  .keyword-line {
    display: block;
    white-space: normal;
    line-height: 1.8;
    border-radius: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
  }

  .btn-primary,
  .btn-link {
    width: 100%;
    justify-content: center;
  }

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

  .business-card {
    min-height: 138px;
    padding: 24px;
  }

  .business-card strong {
    margin-top: 14px;
    font-size: 29px;
  }

  .scroll-hint {
    display: none;
  }

  .intro-band,
  .section {
    padding-top: 28px;
    padding-bottom: 28px;
  }

  .intro-band h2,
  .section-heading h2,
  .split-copy h2,
  .capability-heading h2,
  .project-cta h2 {
    font-size: clamp(36px, 11vw, 52px);
  }

  .about-copy,
  .section-heading p:not(.section-label),
  .split-copy p:not(.section-label) {
    font-size: 16px;
  }

  .section-heading {
    gap: 28px;
    margin-bottom: 22px;
  }

  #strength .section-heading {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
  }

  #strength .section-heading .section-label,
  #strength .section-heading h2,
  #strength .section-heading > p:not(.section-label) {
    grid-column: 1;
    grid-row: auto;
  }

  #strength .section-heading h2,
  #strength .section-heading > p:not(.section-label) {
    align-self: start;
  }

  .award-layout,
  .equipment-layout {
    gap: 28px;
  }

  .contact-layout {
    gap: 22px;
    margin-bottom: 22px;
  }

  .contact-photo,
  .contact-photo img {
    min-height: 220px;
  }

  .erp-points {
    grid-template-columns: 1fr;
  }

  .capability-heading {
    gap: 24px;
    margin-bottom: 22px;
  }

  .capability-row {
    grid-template-columns: 42px 1fr;
    gap: 18px;
    align-items: start;
    min-height: auto;
    padding: 28px 0;
  }

  .cap-title,
  .cap-copy,
  .capability-list ul {
    grid-column: 2 / 3;
  }

  .cap-copy {
    max-width: none;
  }

  .capability-list ul {
    margin-top: 4px;
  }

  .split-media {
    min-height: 320px;
  }

  .project-cta {
    padding: 30px 18px;
  }

  .contact-details-bottom {
    padding: 0 18px 28px;
  }

  .project-contact p {
    font-size: 16px;
  }

  .project-contact a {
    min-height: 62px;
    padding: 0 18px;
    font-size: 16px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 34px 18px;
    gap: 22px;
  }

  .site-footer nav {
    gap: 22px;
  }
}