/* 犀师数学官网 - Brand: #10B060 */
:root {
  --brand: #10b060;
  --brand-dark: #0c8f4d;
  --brand-light: #e8f8ef;
  --brand-soft: #f3fbf7;
  --text: #1a1a1a;
  --text-secondary: #555;
  --text-muted: #888;
  --border: #e6e6e6;
  --bg: #ffffff;
  --bg-alt: #f7faf8;
  --shadow: 0 4px 20px rgba(16, 176, 96, 0.08);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --radius: 8px;
  --radius-pill: 999px;
  --container: 1180px;
  --header-h: 72px;
  --nav-h: 48px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Site header shell */
.site-header {
  position: relative;
  z-index: 300;
}

.nav-backdrop {
  display: none;
}

/* Top bar */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand__logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.brand__name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.brand__tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  background: var(--brand);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  line-height: 1.5;
}

.topbar__contact {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--brand-dark);
  white-space: nowrap;
}

.topbar__phone-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.topbar__phone-icon svg {
  width: 20px;
  height: 20px;
}

.topbar__phone-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.topbar__phone-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-dark);
  letter-spacing: 0.02em;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: transform 0.2s, opacity 0.2s;
  transform-origin: center;
}

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

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

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

/* Nav */
.nav {
  background: var(--brand);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.nav__list {
  display: flex;
  align-items: stretch;
  justify-content: center;
  min-height: var(--nav-h);
  gap: 0;
}

.nav__list a {
  color: #fff;
  padding: 0 22px;
  display: flex;
  align-items: center;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s;
  white-space: nowrap;
}

.nav__list a:hover,
.nav__list a.is-active {
  background: #fff;
  color: var(--brand);
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0a7a42 0%, #10b060 45%, #3dcf86 100%);
  overflow: hidden;
  color: #fff;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(255, 255, 255, 0.18), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(0, 0, 0, 0.12), transparent 45%);
  pointer-events: none;
}

.hero__pattern {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.4) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  padding: 56px 0 64px;
  min-height: 420px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  margin-bottom: 18px;
  backdrop-filter: blur(6px);
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.hero__sub {
  font-size: clamp(15px, 2vw, 18px);
  opacity: 0.95;
  margin-bottom: 12px;
  max-width: 34em;
}

.hero__en {
  font-size: 13px;
  letter-spacing: 0.12em;
  opacity: 0.75;
  margin-bottom: 28px;
  text-transform: uppercase;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: 0.2s;
}

.btn--primary {
  background: #fff;
  color: var(--brand-dark);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.65);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn--brand {
  background: var(--brand);
  color: #fff;
}

.btn--brand:hover {
  background: var(--brand-dark);
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__card {
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  border-radius: 16px;
  padding: 28px 24px;
  width: min(100%, 340px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
  text-align: center;
  animation: floatY 5s ease-in-out infinite;
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.hero__card img {
  width: 120px;
  margin: 0 auto 12px;
}

.hero__card h2 {
  font-size: 22px;
  margin-bottom: 6px;
}

.hero__card .pill {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.hero__stats strong {
  display: block;
  color: var(--brand);
  font-size: 18px;
  line-height: 1.2;
}

.hero__stats span {
  font-size: 12px;
  color: var(--text-muted);
}

/* Feature cards */
.features {
  padding: 40px 0 20px;
  margin-top: -28px;
  position: relative;
  z-index: 2;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card__head {
  height: 110px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  border-bottom: 1px solid var(--border);
}

.feature-card__head--brand {
  background: var(--brand);
}

.feature-card__head img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  color: var(--brand);
}

.feature-card__body {
  padding: 18px 16px 20px;
}

.feature-card h3 {
  color: #1f6f9a;
  font-size: 17px;
  margin-bottom: 10px;
  text-align: center;
}

.feature-card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.feature-card li {
  font-size: 13px;
  color: var(--text-secondary);
  padding-left: 14px;
  position: relative;
  line-height: 1.5;
}

.feature-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.feature-card li.cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 8px;
  padding-left: 0;
}

.feature-card li.cols::before {
  display: none;
}

/* Section common */
.section {
  padding: 56px 0;
}

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

.section__head {
  text-align: center;
  margin-bottom: 36px;
}

.section__head h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--brand);
  font-weight: 800;
  margin-bottom: 6px;
}

.section__head .en {
  color: var(--text-muted);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.section__head .line {
  width: 56px;
  height: 3px;
  background: var(--brand);
  margin: 14px auto 0;
  border-radius: 2px;
  position: relative;
}

.section__head .line::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  background: var(--brand);
  transform: translate(-50%, -50%) rotate(45deg);
}

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

.result-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.result-card__media {
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, var(--brand-light), #d4f0e2);
  display: grid;
  place-items: center;
  position: relative;
}

.result-card__media::after {
  content: "";
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2310b060'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 54% center;
  background-size: 28px;
}

.result-card__score {
  position: absolute;
  left: 12px;
  top: 12px;
  background: rgba(16, 176, 96, 0.95);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.result-card p {
  text-align: center;
  padding: 14px 12px 18px;
  font-size: 14px;
  font-weight: 600;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.metric {
  text-align: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 12px;
}

.metric strong {
  display: block;
  font-size: 28px;
  color: var(--brand);
  line-height: 1.2;
  margin-bottom: 4px;
}

.metric span {
  font-size: 13px;
  color: var(--text-secondary);
}

/* About / product */
.about__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
}

.about__visual {
  background: var(--brand-soft);
  border-radius: 16px;
  padding: 28px;
  text-align: center;
  border: 1px solid #d9f0e3;
}

.about__visual img {
  width: min(100%, 280px);
  margin: 0 auto 16px;
}

.about__visual .quote {
  font-size: 15px;
  color: var(--brand-dark);
  font-weight: 600;
}

.about__content h3 {
  font-size: 24px;
  margin-bottom: 12px;
}

.about__content p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 15px;
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 20px;
}

.about__tags span {
  background: var(--brand-light);
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.timeline__item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 10px;
  text-align: center;
}

.timeline__item strong {
  display: block;
  color: var(--brand);
  font-size: 16px;
  margin-bottom: 4px;
}

.timeline__item span {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Product system */
.system__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.system-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  box-shadow: var(--shadow-card);
}

.system-card__num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 12px;
}

.system-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.system-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 28px;
}

.block-title {
  margin: 28px 0 12px;
  font-size: 20px;
}

.data-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 640px;
}

.data-table th {
  background: var(--brand);
  color: #fff;
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  white-space: nowrap;
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.case-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

.gap-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.gap-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 12px;
  text-align: center;
}

.gap-card strong {
  display: block;
  color: var(--brand-dark);
  margin-bottom: 6px;
}

.gap-card span {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.gap-card p {
  font-size: 13px;
  color: var(--text-secondary);
}

.gap-card--main {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.gap-card--main strong,
.gap-card--main span,
.gap-card--main p {
  color: #fff;
}

.flow__item {
  text-align: center;
  background: var(--brand);
  color: #fff;
  border-radius: 10px;
  padding: 18px 8px;
  position: relative;
}

.flow__item strong {
  display: block;
  font-size: 22px;
  margin-bottom: 4px;
}

.flow__item span {
  font-size: 13px;
  opacity: 0.95;
}

.flow__item small {
  display: block;
  font-size: 11px;
  opacity: 0.8;
  margin-top: 4px;
}

/* Culture */
.culture__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.culture-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 18px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.culture-card__label {
  display: inline-block;
  background: var(--brand-light);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.culture-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--brand-dark);
}

.culture-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Focus / news */
.focus__layout {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 28px;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.news-item {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.news-item__top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.news-item h3 {
  color: var(--brand-dark);
  font-size: 16px;
  font-weight: 700;
}

.news-item h3:hover {
  color: var(--brand);
}

.news-item time {
  color: var(--text-muted);
  font-size: 13px;
  white-space: nowrap;
  flex-shrink: 0;
}

.news-item p {
  font-size: 13px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.side-banners {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.side-banner {
  border-radius: 12px;
  padding: 22px 18px;
  color: #fff;
  background: linear-gradient(145deg, #0c8f4d, #10b060 60%, #3dcf86);
  min-height: 120px;
  box-shadow: var(--shadow);
}

.side-banner h4 {
  font-size: 18px;
  margin-bottom: 6px;
}

.side-banner p {
  font-size: 13px;
  opacity: 0.92;
}

.side-banner--alt {
  background: linear-gradient(145deg, #167a9a, #1f9bbf);
}

.side-banner--dark {
  background: linear-gradient(145deg, #1a5c3a, #0c8f4d);
}

/* Reasons */
.reasons__title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 36px;
}

.reasons__title::before,
.reasons__title::after {
  content: "";
  height: 1px;
  width: min(120px, 18vw);
  background: #ccc;
}

.reasons__title h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
}

.reasons__title em {
  color: var(--brand);
  font-style: normal;
  font-size: 1.35em;
}

.reasons__rows {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.reason-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}

.reason-row--reverse .reason-row__media {
  order: 2;
}

.reason-media {
  border-radius: 12px;
  min-height: 240px;
  background:
    linear-gradient(160deg, rgba(16, 176, 96, 0.92), rgba(12, 143, 77, 0.88)),
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.25), transparent 50%);
  color: #fff;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.reason-media::before {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.reason-media strong {
  font-size: 22px;
  position: relative;
}

.reason-media span {
  font-size: 14px;
  opacity: 0.9;
  position: relative;
}

.reason-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.reason-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.reason-item h3 span {
  color: var(--brand);
  margin-right: 6px;
}

.reason-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* FAQ */
.faq__list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  color: var(--brand);
  font-size: 20px;
  font-weight: 400;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding: 0 18px 16px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Contact */
.contact {
  background: linear-gradient(180deg, var(--bg-alt), #fff);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 32px;
  align-items: start;
}

.contact__info h2 {
  font-size: 28px;
  color: var(--brand);
  margin-bottom: 10px;
}

.contact__info > p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.contact__rows {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact__row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}

.contact__row strong {
  display: block;
  font-size: 14px;
  margin-bottom: 2px;
}

.contact__row span,
.contact__row a {
  font-size: 14px;
  color: var(--text-secondary);
}

.contact__row a:hover {
  color: var(--brand);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.contact-form h3 {
  margin-bottom: 16px;
  font-size: 18px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.form-field label {
  font-size: 13px;
  color: var(--text-secondary);
}

.form-field input,
.form-field textarea,
.form-field select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.2s;
  background: #fff;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--brand);
}

.form-field textarea {
  min-height: 100px;
  resize: vertical;
}

.form-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

.form-success {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--brand-light);
  color: var(--brand-dark);
  border-radius: 8px;
  font-size: 14px;
}

.form-success.is-show {
  display: block;
}

/* Footer */
.footer {
  background: #1b2420;
  color: #cfd8d3;
  padding: 40px 0 24px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer__brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer__brand img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  background: #fff;
  border-radius: 10px;
  padding: 4px;
}

.footer__brand h3 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 6px;
}

.footer__brand p {
  font-size: 13px;
  line-height: 1.6;
}

.footer h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 12px;
}

.footer ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer a:hover {
  color: var(--brand);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  font-size: 12px;
  color: #9aa8a1;
}

/* Float consult */
.float-consult {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #e8f4ff;
  border: 1px solid #c5def5;
  color: #1a4f7a;
  padding: 8px 12px 8px 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(26, 79, 122, 0.16);
  transition: transform 0.2s;
}

.float-consult:hover {
  transform: translateY(-2px);
}

.float-consult__text strong {
  display: block;
  font-size: 14px;
  line-height: 1.2;
}

.float-consult__text span {
  font-size: 15px;
  font-weight: 700;
}

.float-consult__close {
  position: absolute;
  top: -8px;
  right: -4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: #999;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  font-size: 12px;
  line-height: 1;
}

.float-consult.is-hidden {
  display: none;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Mobile */
@media (max-width: 980px) {
  .features__grid,
  .results__grid,
  .system__grid,
  .culture__grid,
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__inner,
  .about__grid,
  .focus__layout,
  .contact__grid,
  .reason-row,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .reason-row--reverse .reason-row__media {
    order: 0;
  }

  .timeline,
  .gap-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 768px) {
  /* 固定顶栏，不占文档流；用 padding 给页面留出空间 */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 300;
  }

  body {
    padding-top: var(--header-h);
  }

  body.nav-open {
    overflow: hidden;
  }

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

  .topbar__contact .topbar__phone-label,
  .topbar__contact .topbar__phone-num {
    display: none;
  }

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

  /* 移动端导航不占高度，菜单浮层叠在页面之上 */
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
    z-index: 2;
  }

  .nav__list {
    display: flex;
    flex-direction: column;
    min-height: 0;
    max-height: min(70vh, 480px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0;
    background: var(--brand);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }

  .nav.is-open .nav__list {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav__list a {
    padding: 14px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .nav__list li:last-child a {
    border-bottom: none;
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1;
    border: 0;
    padding: 0;
    margin: 0;
    background: rgba(0, 0, 0, 0.42);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s;
    cursor: pointer;
  }

  .nav.is-open ~ .nav-backdrop,
  .site-header:has(.nav.is-open) .nav-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .brand__name {
    font-size: 18px;
  }

  .hero__inner {
    padding: 36px 0 48px;
    min-height: auto;
  }

  .hero__visual {
    order: -1;
  }

  .hero__card {
    width: 100%;
    animation: none;
  }

  .features {
    margin-top: 0;
    padding-top: 24px;
  }

  .features__grid,
  .results__grid,
  .system__grid,
  .culture__grid,
  .metrics,
  .flow,
  .timeline,
  .gap-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .feature-card li.cols {
    grid-template-columns: 1fr 1fr;
  }

  .section {
    padding: 40px 0;
  }

  .float-consult {
    right: 10px;
    left: 10px;
    bottom: 12px;
    justify-content: center;
  }

  .footer__grid {
    gap: 22px;
  }
}

@media (max-width: 480px) {
  .brand__logo {
    width: 42px;
    height: 42px;
  }

  .hero h1 {
    font-size: 26px;
  }

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