:root {
  --ink: #172033;
  --muted: #5c667a;
  --line: #dfe5ee;
  --soft: #f5f7fb;
  --white: #ffffff;
  --blue: #2f7df0;
  --blue-deep: #1f5fb8;
  --blue-soft: #eaf4ff;
  --green: #15996c;
  --amber: #b56b0f;
  --shadow: 0 24px 70px rgba(47, 125, 240, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #f7fbff;
  line-height: 1.6;
}

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

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

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(198, 214, 237, 0.82);
  backdrop-filter: blur(16px);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, #f7fbff, #e7f1ff);
  border: 1px solid rgba(47, 125, 240, 0.18);
  display: grid;
  place-items: center;
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(47, 125, 240, 0.12);
}

.brand-mark img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #42526b;
  font-size: 14px;
}

.system-link {
  color: var(--blue);
  font-weight: 800;
}

.nav-links a:hover,
.footer a:hover,
.module-row a:hover,
.more-link a:hover {
  color: var(--blue);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--blue), #60a5fa);
  color: var(--white);
  box-shadow: 0 14px 34px rgba(47, 125, 240, 0.22);
}

.btn.secondary {
  color: var(--ink);
  border-color: rgba(193, 213, 242, 0.92);
  background: rgba(255, 255, 255, 0.94);
}

.btn:hover {
  transform: translateY(-1px);
}

.hero {
  min-height: calc(100vh - 68px);
  display: grid;
  align-items: center;
  padding: 58px 0 58px;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 8%, rgba(255, 255, 255, 0.92) 0, rgba(255, 255, 255, 0) 330px),
    radial-gradient(circle at 88% 16%, rgba(96, 165, 250, 0.34) 0, rgba(96, 165, 250, 0) 360px),
    linear-gradient(135deg, #f8fbff 0%, #e6f2ff 52%, #cfe7ff 100%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 120px;
  background: linear-gradient(180deg, rgba(247, 251, 255, 0) 0%, #f7fbff 78%);
  pointer-events: none;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--blue-deep);
  border: 1px solid rgba(47, 125, 240, 0.18);
  font-size: 13px;
  font-weight: 700;
}

.hero h1 {
  margin: 18px 0;
  font-size: clamp(36px, 5.6vw, 66px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 650px;
  margin: 0;
  color: #4f6075;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 32px;
}

.point {
  padding: 14px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(47, 125, 240, 0.16);
  border-radius: 8px;
  color: var(--ink);
  backdrop-filter: blur(10px);
}

.point:hover,
.link-card:hover,
.doc-item:hover,
.step:hover {
  border-color: rgba(47, 125, 240, 0.36);
  box-shadow: 0 12px 34px rgba(23, 32, 51, 0.08);
}

.point strong {
  display: block;
  font-size: 19px;
}

.point span {
  color: #5c667a;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  padding: 14px;
  border: 1px solid rgba(47, 125, 240, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 28px 80px rgba(47, 125, 240, 0.16);
  backdrop-filter: blur(12px);
}

.hero-visual img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 18px 46px rgba(47, 125, 240, 0.14);
  border: 1px solid rgba(47, 125, 240, 0.16);
}

.notice-card {
  position: absolute;
  right: 18px;
  bottom: -22px;
  width: min(350px, calc(100% - 36px));
  padding: 16px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(193, 213, 242, 0.92);
  border-radius: 8px;
  box-shadow: 0 20px 52px rgba(47, 125, 240, 0.16);
}

.notice-card b {
  display: block;
  margin-bottom: 4px;
}

.notice-card span {
  color: var(--muted);
  font-size: 14px;
}

section {
  padding: 82px 0;
  background: #f7fbff;
}

.section-head {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-head h1,
.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.band {
  background: linear-gradient(180deg, #edf6ff 0%, #f7fbff 100%);
}

.problem-grid,
.docs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: var(--white);
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  padding: 24px;
  min-height: 100%;
  box-shadow: 0 12px 34px rgba(47, 125, 240, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--blue-soft);
  margin-bottom: 14px;
  color: var(--blue);
  font-weight: 800;
  font-size: 13px;
}

.module-list {
  display: grid;
  gap: 12px;
}

.feature-list {
  max-width: 980px;
}

.module-row {
  display: grid;
  grid-template-columns: 124px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 28px rgba(47, 125, 240, 0.05);
}

.module-row strong {
  color: var(--blue);
}

.module-row p {
  margin: 0;
  color: var(--muted);
}

.module-row a {
  color: var(--blue);
  font-weight: 700;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  align-items: stretch;
}

.plan-card {
  display: grid;
  gap: 14px;
  align-content: start;
  position: relative;
  padding: 26px;
  background: var(--white);
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(47, 125, 240, 0.06);
}

.plan-card-featured {
  border-color: rgba(47, 125, 240, 0.48);
  background:
    linear-gradient(180deg, rgba(234, 244, 255, 0.78) 0, rgba(255, 255, 255, 0) 120px),
    var(--white);
  box-shadow: 0 18px 44px rgba(47, 125, 240, 0.13);
}

.plan-card-featured::before {
  content: "推荐";
  position: absolute;
  top: -13px;
  right: 22px;
  padding: 4px 12px;
  border-radius: 999px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), #60a5fa);
  box-shadow: 0 10px 24px rgba(47, 125, 240, 0.18);
  font-size: 12px;
  font-weight: 800;
}

.plan-card-featured .tag {
  color: var(--blue-deep);
  background: rgba(47, 125, 240, 0.12);
}

.plan-card-featured .plan-price b {
  color: var(--blue-deep);
}

.plan-card-featured .btn.primary {
  box-shadow: 0 12px 28px rgba(47, 125, 240, 0.18);
}

.plan-card h3 {
  margin: 0;
  font-size: 24px;
}

.plan-card p {
  margin: 0;
  color: var(--muted);
}

.plan-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.plan-price b {
  color: var(--ink);
  font-size: 42px;
  line-height: 1;
}

.plan-price span {
  color: var(--muted);
  font-weight: 700;
}

.plan-card .btn {
  width: fit-content;
  margin-top: 8px;
}

.plan-note {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  padding: 20px;
  border: 1px solid rgba(181, 107, 15, 0.28);
  border-radius: 8px;
  background: #fff8ed;
}

.plan-note strong {
  color: var(--amber);
}

.plan-note p {
  margin: 0;
  color: var(--muted);
}

.workflow {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.step {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.step:last-child {
  border-bottom: 0;
}

.step-num {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--green);
  font-weight: 800;
}

.step h3 {
  margin: 0 0 5px;
  font-size: 18px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

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

.service-step {
  position: relative;
  padding: 22px;
  min-height: 190px;
  background: var(--white);
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(47, 125, 240, 0.06);
}

.service-step span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), #60a5fa);
  font-weight: 900;
}

.service-step h3 {
  margin: 18px 0 8px;
  font-size: 20px;
}

.service-step p {
  margin: 0;
  color: var(--muted);
}

.service-note {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 20px;
  background: var(--white);
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
}

.service-note strong {
  color: var(--blue);
  white-space: nowrap;
}

.service-note p {
  margin: 0;
  color: var(--muted);
}

.doc-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.doc-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #e9f3ff;
  color: var(--blue);
  font-weight: 900;
}

.doc-item h3 {
  margin: 0 0 5px;
  font-size: 18px;
}

.doc-item p {
  margin: 0;
  color: var(--muted);
}

.screenshot-preview {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, 0.85fr);
  gap: 18px;
}

.screenshot-card {
  position: relative;
  min-height: 172px;
  overflow: hidden;
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 34px rgba(47, 125, 240, 0.08);
}

.screenshot-card-large {
  grid-row: span 3;
}

.screenshot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  transition: transform 0.22s ease;
}

.screenshot-card:hover img {
  transform: scale(1.018);
}

.screenshot-card span {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(210, 221, 236, 0.96);
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(23, 32, 51, 0.1);
}

.demo-disclaimer {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
  padding: 18px 20px;
  border: 1px solid rgba(181, 107, 15, 0.28);
  border-radius: 8px;
  background: #fff8ed;
}

.demo-disclaimer strong {
  color: var(--amber);
}

.demo-disclaimer p {
  margin: 0;
  color: var(--muted);
}

.screenshot-page .guide-content {
  gap: 22px;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.screenshot-figure {
  margin: 16px 0 0;
  overflow: hidden;
  border: 1px solid rgba(210, 221, 236, 0.96);
  border-radius: 8px;
  background: #f8fbff;
}

.screenshot-grid .screenshot-figure {
  margin-top: 0;
}

.screenshot-figure img {
  width: 100%;
  border-bottom: 1px solid rgba(210, 221, 236, 0.96);
}

.screenshot-figure figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 20px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.more-link {
  margin-top: 18px;
  font-weight: 800;
  color: var(--blue);
}

.footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.police-beian {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.police-beian img {
  width: 18px;
  height: 20px;
  object-fit: contain;
  flex: 0 0 auto;
}

.support-float {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: 218px;
  min-height: 64px;
  padding: 10px 14px 10px 12px;
  border: 1px solid rgba(193, 213, 242, 0.9);
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 44px rgba(23, 32, 51, 0.18);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.support-float:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 54px rgba(23, 32, 51, 0.22);
}

.support-icon,
.support-head-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  font-weight: 900;
}

.support-head-icon {
  background: var(--white);
  border: 1px solid var(--line);
  overflow: hidden;
}

.support-head-icon img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.support-text {
  display: grid;
  gap: 2px;
  min-width: 0;
  text-align: left;
}

.support-text span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.support-text b {
  font-size: 14px;
}

.support-text em {
  padding: 3px 6px;
  border-radius: 999px;
  color: var(--green);
  background: #e9f8f2;
  font-style: normal;
  font-size: 11px;
  font-weight: 900;
}

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

.support-arrow {
  margin-left: auto;
  color: var(--muted);
  font-size: 24px;
}

 .support-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  place-items: center;
  padding: 18px;
  background: rgba(15, 23, 42, 0.56);
}

.support-modal.is-open {
  display: grid;
}

.support-dialog {
  position: relative;
  width: min(430px, 100%);
  max-height: calc(100vh - 36px);
  overflow: auto;
  padding: 22px;
  border: 1px solid rgba(209, 222, 241, 0.9);
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 28px 80px rgba(15, 23, 42, 0.28);
}

.support-dialog::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 118px;
  border-radius: 22px 22px 0 0;
  background: linear-gradient(135deg, #eef7ff, #ffffff 58%, #fff5eb);
  pointer-events: none;
}

.support-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 3;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(203, 216, 235, 0.95);
  border-radius: 12px;
  color: #526078;
  background: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.support-head,
.support-body,
.support-tip {
  position: relative;
  z-index: 1;
}

.support-head {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: center;
  padding-right: 46px;
}

.support-head h2 {
  margin: 0 0 2px;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.support-head p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.support-body {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.support-qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.support-qr-card {
  padding: 14px 14px 16px;
  border: 1px solid rgba(211, 224, 242, 0.95);
  border-radius: 18px;
  background: #f8fbff;
  text-align: center;
}

.support-card-title {
  display: grid;
  gap: 2px;
  margin-bottom: 10px;
}

.support-card-title strong {
  color: var(--ink);
  font-size: 17px;
  line-height: 1.35;
}

.support-card-title span {
  color: var(--muted);
  font-size: 13px;
}

.support-qr {
  width: min(210px, 76vw);
  margin: 0 auto;
  padding: 8px;
  border: 1px solid rgba(211, 224, 242, 0.95);
  border-radius: 16px;
  background: #ffffff;
}

.support-qr img {
  width: 100%;
  border-radius: 10px;
}

.support-methods {
  display: grid;
  gap: 10px;
}

.support-taobao-button {
  display: grid;
  grid-template-columns: 42px 1fr 18px;
  gap: 12px;
  align-items: center;
  min-height: 78px;
  padding: 14px;
  border-radius: 18px;
  color: #ffffff;
  background: linear-gradient(135deg, #ff6a00, #ff9b22);
  box-shadow: 0 16px 32px rgba(255, 105, 0, 0.24);
}

.support-taobao-button:hover {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(255, 105, 0, 0.3);
}

.support-taobao-badge {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: #ff6a00;
  background: rgba(255, 255, 255, 0.95);
  font-size: 18px;
  font-weight: 900;
}

.support-taobao-button strong {
  display: block;
  font-size: 18px;
  line-height: 1.25;
}

.support-taobao-button em {
  display: block;
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.86);
  font-style: normal;
  font-size: 12px;
  line-height: 1.4;
}

.support-taobao-arrow {
  font-size: 24px;
  line-height: 1;
}

.support-email-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 13px 14px;
  border: 1px solid rgba(211, 224, 242, 0.95);
  border-radius: 16px;
  background: #ffffff;
}

.support-email-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
}

.support-email-card strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.support-copy-button {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(47, 125, 240, 0.2);
  border-radius: 11px;
  color: var(--blue-deep);
  background: var(--blue-soft);
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
}

.support-tip {
  margin: 12px 0 0;
  color: #6b7280;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
}

.guide-page {
  padding-top: 44px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 30px;
  align-items: start;
}

.side-nav {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 8px;
  padding: 14px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.side-nav a {
  padding: 9px 10px;
  border-radius: 8px;
  color: var(--muted);
}

.side-nav a:hover {
  background: var(--white);
  color: var(--blue);
}

.guide-content {
  display: grid;
  gap: 18px;
}

.guide-content article,
.guide-note {
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-content h2,
.guide-content h3 {
  margin-top: 0;
}

.guide-content p,
.guide-content li {
  color: var(--muted);
}

.guide-content ol,
.guide-content ul {
  padding-left: 22px;
}

@media (max-width: 980px) {
  .hero-grid,
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 44px;
  }

  .hero-points,
  .problem-grid,
  .docs,
  .screenshot-preview,
  .plan-grid,
  .service-flow {
    grid-template-columns: 1fr;
  }

  .screenshot-card-large {
    grid-row: auto;
  }

  .module-row {
    grid-template-columns: 1fr;
  }

  .nav-cta {
    display: none;
  }

  .menu-button {
    display: grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 68px;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 10px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 18px 42px rgba(23, 32, 51, 0.14);
  }

  .nav-links.is-open {
    display: grid;
  }

  .nav-links a {
    padding: 12px;
  }

  .side-nav {
    position: static;
  }

  .service-note {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .notice-card {
    position: static;
    margin-top: 14px;
    width: 100%;
  }

  .doc-item,
  .step,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .plan-card .btn {
    width: 100%;
  }

  .support-float {
    right: 16px;
    bottom: 82px;
    width: 58px;
    min-height: 58px;
    padding: 0;
    justify-content: center;
    border-radius: 8px;
  }

  .support-icon {
    width: 58px;
    height: 58px;
    flex-basis: 58px;
    background: linear-gradient(135deg, var(--blue), var(--green));
  }

  .support-text,
  .support-arrow {
    display: none;
  }

  .support-dialog {
    padding: 18px;
    border-radius: 20px;
  }

  .support-head {
    grid-template-columns: 42px 1fr;
    padding-right: 42px;
  }

  .support-head-icon {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .support-head h2 {
    font-size: 23px;
  }

  .support-head p {
    font-size: 12px;
  }

  .support-body {
    margin-top: 14px;
  }

  .support-qr-card {
    padding: 12px 12px 14px;
  }

  .support-qr-grid {
    grid-template-columns: 1fr;
  }

  .support-qr {
    width: min(190px, 70vw);
  }

  .support-taobao-button {
    min-height: 72px;
    padding: 12px;
  }

  .support-taobao-button strong {
    font-size: 17px;
  }

  .support-copy-button {
    padding: 0 10px;
  }

}