/* 本文件与 index_article.htm 同目录，用于本地保存离线展示 */

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

.zd21adbody {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "Noto Sans SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #0f172a;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(59, 130, 246, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(16, 185, 129, 0.14), transparent 60%),
    #f7fafc;
}

.zd21adpage {
  min-height: 100vh;
  overflow-x: clip;
}

.zd21adcontainer {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 18px;
  min-width: 0;
}

/* 避免锚点跳转时被 sticky header 遮挡 */
.zd21admain section[id] {
  scroll-margin-top: 88px;
}

.zd21adheader {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  position: sticky;
  top: 0;
  z-index: 20;
}

.zd21adheaderInner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.zd21adbrand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
}

.zd21adbrandMark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(16, 185, 129, 0.95));
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.zd21adbrandName {
  font-weight: 800;
  line-height: 1.15;
}

.zd21adbrandSub {
  margin-top: 2px;
  font-size: 12px;
  color: rgba(15, 23, 42, 0.7);
}

.zd21adnavToggle {
  display: none;
}

.zd21adnavToggleBtn {
  display: none;
}

.zd21adnavList {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.zd21adnavLink {
  text-decoration: none;
  color: rgba(15, 23, 42, 0.8);
  font-weight: 650;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 10px;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
  display: inline-block;
}

.zd21adnavLink:hover {
  background: rgba(37, 99, 235, 0.10);
  color: rgba(37, 99, 235, 0.95);
  transform: translateY(-1px);
}

.zd21admain {
  padding-bottom: 32px;
}

.zd21adhero {
  padding: 34px 0 10px;
}

.zd21adheroGrid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: start;
}

.zd21adheroLeft,
.zd21adheroRight,
.zd21adcard,
.zd21adtimeItem,
.zd21adfeature,
.zd21adprivacyCard,
.zd21adkeywordCol,
.zd21adfaqItem {
  min-width: 0;
}

.zd21adheroRight {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
}

.zd21adheroImageWrap {
  width: 100%;
  max-width: 440px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 22px;
  padding: 10px;
  box-shadow: 0 22px 46px rgba(15, 23, 42, 0.06);
}

.zd21adheroImage {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}

.zd21adh1 {
  margin: 0;
  font-size: clamp(28px, 4.2vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.2px;
}

.zd21adlead {
  margin: 14px 0 18px;
  font-size: clamp(14px, 2.2vw, 16px);
  line-height: 1.8;
  color: rgba(15, 23, 42, 0.78);
}

.zd21adctaRow {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.zd21adbtn {
  text-decoration: none;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 800;
  font-size: 14px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.zd21adbtn_full {
  width: 100%;
}

.zd21adbtn_primary {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(16, 185, 129, 0.95));
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.18);
}

.zd21adbtn_primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.24);
}

.zd21adbtn_ghost {
  background: rgba(255, 255, 255, 0.8);
  color: rgba(15, 23, 42, 0.86);
  border-color: rgba(15, 23, 42, 0.12);
}

.zd21adbtn_ghost:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 1);
  border-color: rgba(37, 99, 235, 0.25);
}

.zd21adquickFacts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.zd21adfact {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  padding: 12px;
}

.zd21adfactTop {
  font-weight: 900;
  color: rgba(37, 99, 235, 0.95);
}

.zd21adfactTitle {
  margin-top: 6px;
  font-weight: 900;
}

.zd21adfactText {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(15, 23, 42, 0.75);
  line-height: 1.55;
}

.zd21adpanel {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.06);
}

.zd21adpanelTitle {
  font-weight: 950;
  font-size: 16px;
}

.zd21adpanelText {
  margin: 10px 0 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(15, 23, 42, 0.78);
}

.zd21adtagRow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.zd21adtag {
  background: rgba(37, 99, 235, 0.10);
  color: rgba(37, 99, 235, 0.95);
  border: 1px solid rgba(37, 99, 235, 0.18);
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 850;
  font-size: 12.5px;
}

.zd21adpanelDivider {
  height: 1px;
  background: rgba(15, 23, 42, 0.08);
  margin: 10px 0 14px;
}

.zd21adpanelSteps {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
}

.zd21adpanelStep {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.zd21adstepNo {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(16, 185, 129, 0.14);
  color: rgba(16, 185, 129, 0.95);
  font-weight: 900;
}

.zd21adstepTitle {
  font-weight: 900;
}

.zd21adstepText {
  margin-top: 4px;
  font-size: 12.8px;
  line-height: 1.55;
  color: rgba(15, 23, 42, 0.75);
}

.zd21adsection {
  padding: 34px 0;
}

/* 统一增强板块分隔感：相邻 section 之间增加更粗分割线 */
.zd21admain > .zd21adsection + .zd21adsection {
  border-top: 2px solid rgba(148, 163, 184, 0.35);
}

/* 主横幅（hero）与服务范围首个 section 之间的分隔线 */
.zd21admain > .zd21adhero + .zd21adsection {
  border-top: 2px solid rgba(148, 163, 184, 0.35);
}

.zd21adsectionAlt {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08), transparent 40%);
  border-top: 1px solid rgba(15, 23, 42, 0.05);
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

.zd21adsectionAlt2 {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08), transparent 45%);
  border-top: 1px solid rgba(15, 23, 42, 0.05);
}

.zd21adsectionHead {
  text-align: center;
  margin-bottom: 18px;
}

.zd21adh2 {
  margin: 0;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: -0.1px;
  font-weight: 980;
}

.zd21adsectionSub {
  margin: 10px auto 0;
  max-width: 720px;
  color: rgba(15, 23, 42, 0.75);
  line-height: 1.8;
  font-size: 14.5px;
}

.zd21adh3 {
  margin: 0;
  font-size: 16px;
  font-weight: 950;
}

.zd21adcardGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.zd21adcard {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.05);
  height: 100%;
}

.zd21adcardIcon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.10);
  color: rgba(37, 99, 235, 0.95);
  display: grid;
  place-items: center;
}

.zd21adcardText {
  margin-top: 10px;
  font-size: 13.7px;
  line-height: 1.75;
  color: rgba(15, 23, 42, 0.78);
}

.zd21adcardMeta {
  margin-top: 12px;
  font-size: 12.7px;
  color: rgba(15, 23, 42, 0.65);
}

.zd21adkeywordPanel {
  margin-top: 14px;
  border-radius: 22px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: rgba(255, 255, 255, 0.52);
  padding: 16px;
}

.zd21adkeywordPanelHead {
  margin-bottom: 12px;
}

.zd21adkeywordSub {
  margin-top: 8px;
  color: rgba(15, 23, 42, 0.75);
  line-height: 1.75;
  font-size: 13.8px;
  max-width: 720px;
}

.zd21adkeywordGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.zd21adkeywordCol {
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: 18px;
  padding: 12px;
}

.zd21adkeywordTitle {
  font-weight: 980;
  font-size: 14.5px;
  margin-bottom: 10px;
}

.zd21adtimeline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 10px;
}

.zd21adtimeItem {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
  height: 100%;
}

.zd21adtimeNo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(37, 99, 235, 0.14);
  color: rgba(37, 99, 235, 0.95);
  font-weight: 980;
}

.zd21adtimeBody .zd21adh3 {
  margin-top: 2px;
}

.zd21adfeatureRow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.zd21adfeature {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
  height: 100%;
}

.zd21adfeatureTitle {
  font-weight: 980;
}

.zd21adfeatureText {
  margin-top: 8px;
  font-size: 13.7px;
  line-height: 1.7;
  color: rgba(15, 23, 42, 0.76);
}

.zd21adtwoCol {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 14px;
  align-items: start;
}

.zd21adarticle {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.zd21adlist {
  margin: 14px 0 0;
  padding: 0 0 0 18px;
  color: rgba(15, 23, 42, 0.78);
  line-height: 1.85;
  font-size: 14px;
}

.zd21adlistItem {
  margin: 6px 0;
}

.zd21adstickyPanel {
  position: sticky;
  top: 96px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  overflow: hidden;
}

.zd21adstickyTop {
  padding: 14px 16px;
  font-weight: 980;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(16, 185, 129, 0.10));
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.zd21adstickyBody {
  padding: 14px 16px 10px;
  display: grid;
  gap: 10px;
}

.zd21adstickyRow {
  display: grid;
  gap: 6px;
}

.zd21adstickyK {
  font-size: 12.8px;
  font-weight: 850;
  color: rgba(15, 23, 42, 0.62);
}

.zd21adstickyV {
  font-weight: 980;
  letter-spacing: -0.1px;
}

.zd21adstickyBottom {
  padding: 12px 16px 16px;
}

.zd21adsubGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.zd21adsubCard {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.zd21adprivacyFrame {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 14px;
  align-items: start;
}

.zd21adprivacyRail {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 20px;
  padding: 14px;
}

.zd21adprivacyRailTop {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.zd21adprivacyBadge {
  font-size: 12px;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(16, 185, 129, 0.95));
  padding: 6px 10px;
  border-radius: 999px;
}

.zd21adprivacySteps {
  display: grid;
  gap: 10px;
}

.zd21adprivacyStep {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  padding: 10px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
}

.zd21adprivacyNo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 980;
  color: rgba(37, 99, 235, 0.95);
  background: rgba(37, 99, 235, 0.14);
}

.zd21adprivacyStepTitle {
  font-weight: 950;
}

.zd21adprivacyStepText {
  margin-top: 4px;
  font-size: 13.3px;
  line-height: 1.65;
  color: rgba(15, 23, 42, 0.75);
}

.zd21adprivacyMain {
  display: grid;
  gap: 12px;
}

.zd21adprivacyGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.zd21adprivacyCard {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 14px;
  height: 100%;
}

.zd21adprivacyTitle {
  font-weight: 980;
}

.zd21adprivacyNote {
  border-radius: 16px;
  border: 1px dashed rgba(16, 185, 129, 0.25);
  background: rgba(16, 185, 129, 0.08);
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(15, 23, 42, 0.82);
}

.zd21adcaseGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.zd21adcaseCard {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.zd21adcaseTags {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.zd21adchip {
  font-size: 12.5px;
  font-weight: 900;
  color: rgba(15, 23, 42, 0.75);
  background: rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(15, 23, 42, 0.08);
  padding: 6px 10px;
  border-radius: 999px;
}

.zd21adfaqFrame {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 14px;
  align-items: start;
}

.zd21adfaqAside {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 20px;
  padding: 14px;
  position: sticky;
  top: 92px;
}

.zd21adfaqAsideTitle {
  font-weight: 980;
  font-size: 16px;
}

.zd21adfaqAsideList {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.zd21adfaqAsideItem {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 14px;
  background: rgba(248, 250, 252, 0.85);
  padding: 10px 12px;
  font-weight: 850;
  font-size: 13.6px;
  color: rgba(15, 23, 42, 0.82);
}

.zd21adfaqAsideTip {
  margin-top: 12px;
  border-radius: 14px;
  border: 1px dashed rgba(37, 99, 235, 0.25);
  background: rgba(37, 99, 235, 0.08);
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(15, 23, 42, 0.8);
}

.zd21adfaqMain {
  display: grid;
  gap: 12px;
}

.zd21adfaqGroupTitle {
  font-size: 14.8px;
  font-weight: 980;
  color: rgba(15, 23, 42, 0.84);
  margin-top: 2px;
}

.zd21adfaqGrid {
  display: grid;
  gap: 10px;
}

.zd21adfaqItem {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  padding: 0 14px;
}

.zd21adfaqSummary {
  padding: 12px 0;
  list-style: none;
  cursor: pointer;
  font-weight: 980;
  font-size: 14.4px;
}

.zd21adfaqSummary::-webkit-details-marker {
  display: none;
}

.zd21adfaqBody {
  padding: 0 0 12px;
  color: rgba(15, 23, 42, 0.78);
  line-height: 1.75;
  font-size: 13.8px;
}

.zd21adcontactWrap {
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 22px;
  padding: 18px;
}

.zd21adcontactHead {
  text-align: center;
}

.zd21adcontactFrame {
  margin-top: 10px;
  display: grid;
  gap: 14px;
}

.zd21adcontactFlow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.zd21adcontactFlowItem {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  padding: 10px;
}

.zd21adcontactFlowNo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 980;
  color: rgba(37, 99, 235, 0.95);
  background: rgba(37, 99, 235, 0.14);
}

.zd21adcontactFlowTitle {
  font-weight: 950;
}

.zd21adcontactFlowText {
  margin-top: 4px;
  font-size: 13.2px;
  line-height: 1.6;
  color: rgba(15, 23, 42, 0.75);
}

.zd21adcontactGrid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 14px;
  margin-top: 10px;
}

.zd21adform {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.zd21adformRow {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.zd21adlabel {
  font-weight: 920;
  font-size: 14px;
}

.zd21adinput,
.zd21adselect,
.zd21adtextarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  padding: 11px 12px;
  font-size: 14px;
  outline: none;
  background: rgba(248, 250, 252, 0.9);
}

.zd21adtextarea {
  resize: vertical;
}

.zd21adinput:focus,
.zd21adselect:focus,
.zd21adtextarea:focus {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.zd21adformActions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.zd21adformHint {
  margin: 12px 0 0;
  font-size: 12.8px;
  color: rgba(15, 23, 42, 0.68);
  line-height: 1.6;
}

.zd21adcontactAside {
  display: grid;
  gap: 14px;
}

.zd21adasideCard {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  padding: 16px;
}

.zd21adasideCardAlt {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08), rgba(255, 255, 255, 0.78));
}

.zd21adasideTitle {
  font-weight: 980;
  margin-bottom: 10px;
}

.zd21adbullets {
  display: grid;
  gap: 10px;
}

.zd21adbullet {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 850;
  color: rgba(15, 23, 42, 0.8);
}

.zd21addot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(16, 185, 129, 0.95));
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.18);
}

.zd21adfooter {
  margin-top: 12px;
  padding: 16px 0 12px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.65);
}

.zd21adfooterInner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 8px;
  align-items: start;
}

.zd21adfooterBrand {
  font-weight: 980;
}

.zd21adfooterText {
  margin-top: 6px;
  color: rgba(15, 23, 42, 0.72);
  line-height: 1.6;
  font-size: 13px;
}

.zd21adfooterTitle {
  font-weight: 980;
  margin-bottom: 6px;
  font-size: 14px;
}

.zd21adfooterLinks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.zd21adfooterLink {
  text-decoration: none;
  color: rgba(15, 23, 42, 0.8);
  font-weight: 820;
  font-size: 13px;
  padding: 7px 8px;
  border-radius: 10px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.72);
  line-height: 1.25;
}

.zd21adfooterLink:hover {
  border-color: rgba(37, 99, 235, 0.25);
}

.zd21adcopyright {
  margin-top: 8px;
  color: rgba(15, 23, 42, 0.65);
  font-size: 12.4px;
  line-height: 1.5;
}

.zd21adfooter .zd21adlist {
  margin: 6px 0 0;
  padding-left: 16px;
  line-height: 1.6;
  font-size: 13px;
}

.zd21adfooter .zd21adcontainer + .zd21adcontainer {
  margin-top: 4px;
}

/* Responsive */
@media (max-width: 1200px) {
  .zd21adcontainer {
    max-width: 1040px;
  }
}

@media (max-width: 980px) {
  .zd21adcontainer {
    padding: 0 16px;
  }
  .zd21adsection {
    padding: 30px 0;
  }
  .zd21adheroGrid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .zd21adheroRight {
    justify-content: flex-start;
    order: 2;
    width: 100%;
  }
  .zd21adheroLeft {
    order: 1;
  }
  .zd21adheroImageWrap {
    max-width: 100%;
  }
  .zd21adquickFacts {
    grid-template-columns: 1fr;
  }
  .zd21adcardGrid {
    grid-template-columns: 1fr 1fr;
  }
  .zd21adtimeline {
    grid-template-columns: 1fr;
  }
  .zd21adfeatureRow {
    grid-template-columns: 1fr;
  }
  .zd21adtwoCol {
    grid-template-columns: 1fr;
  }
  .zd21adstickyPanel {
    position: relative;
    top: auto;
  }
  .zd21adsubGrid {
    grid-template-columns: 1fr;
  }
  .zd21adprivacyFrame {
    grid-template-columns: 1fr;
  }
  .zd21adprivacyGrid {
    grid-template-columns: 1fr 1fr;
  }
  .zd21adcaseGrid {
    grid-template-columns: 1fr;
  }
  .zd21adcontactGrid {
    grid-template-columns: 1fr;
  }
  .zd21adcontactFlow {
    grid-template-columns: 1fr 1fr;
  }
  .zd21adfaqFrame {
    grid-template-columns: 1fr;
  }
  .zd21adfaqAside {
    position: relative;
    top: auto;
  }
  .zd21adfooterInner {
    grid-template-columns: 1fr;
  }

  .zd21adkeywordGrid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .zd21adcontainer {
    padding: 0 14px;
  }
  .zd21adsection {
    padding: 24px 0;
  }
  .zd21admain > .zd21adsection + .zd21adsection,
  .zd21admain > .zd21adhero + .zd21adsection {
    border-top-width: 1px;
  }
  .zd21adh1 {
    font-size: 24px;
  }
  .zd21adlead {
    line-height: 1.7;
  }
  .zd21adh2 {
    font-size: 23px;
  }
  .zd21adnav {
    width: 100%;
  }
  .zd21adnavList {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .zd21adnavLink {
    width: 100%;
    text-align: center;
    padding: 8px 6px;
    font-size: 12.5px;
  }
  .zd21adbtn {
    width: 100%;
  }
  .zd21adctaRow {
    gap: 10px;
  }
  .zd21adh3 {
    font-size: 15px;
  }
  .zd21adcardText {
    font-size: 13.4px;
    line-height: 1.7;
  }
  .zd21adcardMeta {
    font-size: 12.4px;
    margin-top: 10px;
  }
  .zd21adcardIcon {
    width: 36px;
    height: 36px;
    border-radius: 12px;
  }
  .zd21adcardGrid {
    grid-template-columns: 1fr;
  }
  .zd21adprivacyGrid {
    grid-template-columns: 1fr;
  }
  .zd21adnavList {
    justify-content: flex-start;
  }
  .zd21adheaderInner {
    flex-direction: column;
    align-items: flex-start;
  }
  .zd21adcontactFlow {
    grid-template-columns: 1fr;
  }
  .zd21adfooterLinks {
    grid-template-columns: 1fr 1fr;
  }
  .zd21adheroImageWrap {
    padding: 6px;
    border-radius: 14px;
    aspect-ratio: 16 / 9;
  }
  .zd21adheroImage {
    height: 100%;
    object-fit: cover;
    object-position: center;
  }
}

@media (max-width: 420px) {
  .zd21adheader {
    position: static;
  }
  .zd21admain section[id] {
    scroll-margin-top: 12px;
  }
  .zd21adbrand {
    min-width: 0;
  }
  .zd21adbrandName {
    font-size: 16px;
  }
  .zd21adbrandSub {
    font-size: 11px;
  }
  .zd21adnavList {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
    gap: 7px;
  }
  .zd21adnavLink {
    padding: 7px 6px;
    font-size: 12px;
  }
  .zd21adtagRow {
    gap: 6px;
    margin-bottom: 10px;
  }
  .zd21adhero {
    padding-top: 20px;
  }
  .zd21adheroImageWrap {
    padding: 5px;
    border-radius: 12px;
  }
  .zd21adheroImage {
    border-radius: 10px;
  }
  .zd21adcard,
  .zd21adtimeItem,
  .zd21adfeature,
  .zd21adprivacyCard,
  .zd21adfaqItem,
  .zd21adkeywordCol,
  .zd21adsubCard {
    padding: 12px;
    border-radius: 14px;
  }
  .zd21adprivacyRail,
  .zd21adfaqAside,
  .zd21adkeywordPanel {
    border-radius: 16px;
    padding: 12px;
  }
  .zd21adfaqSummary {
    font-size: 14px;
    padding: 10px 0;
  }
  .zd21adfaqBody {
    font-size: 13.4px;
    line-height: 1.7;
  }
  .zd21adtag {
    font-size: 12px;
    padding: 5px 9px;
  }
  .zd21adfaqAsideItem {
    font-size: 13px;
    padding: 9px 10px;
  }
  .zd21adprivacyStepText,
  .zd21adfaqBody,
  .zd21adsectionSub {
    line-height: 1.65;
  }
  .zd21adfooter {
    margin-top: 14px;
    padding: 12px 0 8px;
  }
  .zd21adfooterLinks {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 360px) {
  .zd21adcontainer {
    padding: 0 12px;
  }
  .zd21adh1 {
    font-size: 22px;
    line-height: 1.2;
  }
  .zd21adh2 {
    font-size: 21px;
  }
  .zd21adlead,
  .zd21adsectionSub {
    font-size: 13.4px;
  }
  .zd21adbtn {
    font-size: 13px;
    padding: 9px 12px;
  }
  .zd21adnavLink {
    font-size: 11.5px;
    padding: 6px 5px;
  }
  .zd21adbrandName {
    font-size: 15px;
  }
  .zd21adbrandSub {
    font-size: 10.5px;
  }
  .zd21adtag {
    font-size: 11.5px;
    padding: 4px 8px;
  }
  .zd21adfaqSummary {
    font-size: 13.5px;
  }
}

@media (max-width: 320px) {
  .zd21adcontainer {
    padding: 0 10px;
  }
  .zd21adh1 {
    font-size: 20px;
  }
  .zd21adh2 {
    font-size: 19px;
  }
  .zd21adbtn {
    font-size: 12.5px;
    padding: 8px 10px;
  }
}

/* 移动端栏目导航：汉堡菜单收纳 */
@media (max-width: 768px) {
  .zd21adheaderInner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 10px;
  }
  .zd21adbrand {
    min-width: 0;
  }
  .zd21adnavToggleBtn {
    display: inline-flex;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    background: rgba(255, 255, 255, 0.82);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
  }
  .zd21adnavToggleBtn span {
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: rgba(15, 23, 42, 0.82);
    transition: transform 180ms ease, opacity 180ms ease;
  }
  .zd21adnav {
    grid-column: 1 / -1;
    width: 100%;
    max-height: 0;
    opacity: 0;
    overflow: hidden auto;
    pointer-events: none;
    transition: max-height 220ms ease, opacity 180ms ease, margin-top 180ms ease;
    margin-top: 0;
  }
  .zd21adnavList {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: flex-start;
    width: 100%;
    gap: 6px;
  }
  .zd21adnavList li {
    width: 100%;
  }
  .zd21adnavLink {
    width: 100%;
    text-align: left;
    padding: 9px 10px;
    font-size: 13px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: rgba(255, 255, 255, 0.7);
  }
  .zd21adnavToggle:checked + .zd21adnavToggleBtn + .zd21adnav {
    max-height: min(70vh, 480px);
    opacity: 1;
    margin-top: 4px;
    pointer-events: auto;
  }
  .zd21adnavToggle:checked + .zd21adnavToggleBtn span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .zd21adnavToggle:checked + .zd21adnavToggleBtn span:nth-child(2) {
    opacity: 0;
  }
  .zd21adnavToggle:checked + .zd21adnavToggleBtn span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* 触控设备统一提高可点击面积 */
@media (hover: none) and (pointer: coarse) {
  .zd21adnavLink,
  .zd21adbtn,
  .zd21adfaqSummary,
  .zd21adfooterLink {
    min-height: 42px;
  }
}

/* 窄屏且高度较低设备（小屏横屏/旧机型） */
@media (max-width: 768px) and (max-height: 520px) {
  .zd21adheader {
    position: static;
  }
  .zd21adhero {
    padding-top: 16px;
  }
  .zd21adsection {
    padding: 20px 0;
  }
}

/* 刘海屏安全区 */
@supports (padding: max(0px)) {
  .zd21adheader {
    padding-top: env(safe-area-inset-top);
  }
  .zd21adfooter {
    padding-bottom: max(26px, env(safe-area-inset-bottom));
  }
}